We all have our crosses to bear

问几道英语选择,
1.let us suppose thata child suddenly crosses the road.Imagine it _
a would happen b happening c had been happening
2.he began to acquire confidence.he gradually_confident
a become b come c obtained d took
3.The drunk stepped aside and let the bull_
a passing b to pass c in passing d pass
4.__however,three men had come into the ring.
a up till that time b by then c so far d until then
5it took on before __its attention to the matador
a turn b to turn c it turned d it was turning
6 it looked on sympathetically.it___him.
a liked b loved c sympathised d felt sorry for
顺便说下为什么吧,这些真的不会.

The High Level Bridge,a railway bridge that crosses the Oldman River,is over 1 km long.From one point on the river,the angle of elevation of the top of the bridge is 62.6 degrees.From a point 20 m closer to the brdige,the angle of elevation of the top of the bridge is 72.8 degrees.How high is the bridge above the river,to the nearest metre?
Hobbyists often compete with their model rockets to determine which rocket flies the highest.On one test launch,a rocket was fired vertically upward.The angle of elevation to the top of the flight was measured from two points that were 20 m apart,on the same side of the launch site,and collinear with it.The angles measured a the two points were 66 degrees and 37 degrees.How high did the rocket fly,to the nearest metre?

______ the Atlantic Ocean crosses the equator, the trade winds cause a flow of water to the west. A．That B．When C．Where D．Though

One11-year-old boy，Liang|iag，crosses the river every schooI day，

英语翻译
1.what do you do when admiration crosses over the line into jealousy?
2.unless of course you want to appear totally conceited
3.Try instead to include him in your new life and see how that works out.
4.we should meet the needs of our friends and give them a hand if necessary.

Find the two points where the curve crosses the -axis and show that the tangents to the
Find the two points where the curve crosses the -axis and show that the tangents to the curve at these points are parallel.What is the common slope of these tangents?
Two plants grow in such a way that days after planting,they are and centimeters tall,respectively,where and
At what rate is the first plant growing at time days?Is the rate of growth of the second plant increasing or decreasing at this time?
Which plant is growing more rapidly when it is 20 days after planting?
A closed rectangular box is to be constructed with a base that is twice as long as it is wide.Suppose that the total surface area must be 27 square feet.Find the dimensions of the box that will maximize the volume.
Find the indefinite or definite integrals for the following.
x05x05 (b) x05(c)
x05(d)x05x05 (e) x05(f)
x05The market research department of a supermarket chain has determined that,for one store,the x05marginal price p’(x) at x tubes per week for a certain brand of toothpaste is given by x05.x05
x05Find the price-demand equation if the weekly demand is 50 tubes when the price of a tube is $2.35.
Find the weekly demand when the price of a tube is $1.89.
The demand function for a certain commodity is ,where is the price in dollars at which the commodity is sold.The unit production cost is $20.At what price will the total profit be the greatest?
Find the area of the region bounded by the curves and the x-axis between the interval and .
A factory’s revenue function is dollars in the year t from now,and the cost function is dollars,where t = 0 corresponds to now.
Which year from now the factory can get the break-even?
When the factory gets the break-even,what is the total profit in these t years from now?
A ball moves in the path of a straight line,the instantaneous speed of the ball is given by ,where S (in miles) is its moving distance.
What is the function of the distance S
What is the acceleration in terms of t
In the manufacture of a product,the marginal cost function is (dollars per unit),where y is the number of units produced in one day.The minimum cost is $50 when there is no product produced.Find the total cost function with respect to y.
1.the curve x^2+xy+y^2=7 2.where p1(t)=2/1+25e^-0.3t and p2(t)=20/1+17e^-o.6t
5.dp/dx=-0.015e^-o.o1x 6 .d(p)=4800-2p^2
8.r(t)=5000-20t c(t)=2000+10t^2
9.ds/dt=4te^t^2

_______ the Atlantic Ocean crosses the equator, the trade winds cause a flow of water to the west. A．That B．When C．Where D．Though

2.The plane at the present speed until it crosses the mountain at about ten tonight.
2.The plane at the present speed until it crosses the mountain at about ten tonight.
A.would go B.went C.will be going D.goes
选那个为什么

1.__that___atlantic ocean crosses the equator,the trade winds cause a flow of water to the west.
a that b when c where d though
2.she put an extra blanket over the baby for fear that________
a he catches cold
b he should catch cold
c he caught cold
d he be catching cold
第二题选择B.

谁能给我讲下这句话的语法结构
Genetic crosses of macrophage-deficient, osteopetrotic mice that are mutant for the macrophage growth factor CSF1 (Csf1op/op) with MMTV-PyMT mice show reduced progression to malignancy and metastatic disease

Tom often helps the old people___ the road.A.cross B.crosses C.crossing D.croossed

这句话As the lights come up,HEIDI enters and crosses Down Right to the edge of the stage中,the edge of the dtage是什么意思啊?

The Great Green Wall crosses the(north) part of the country用所给词的适当形式填空,最好有讲解

when he crosses the finishing line,his step,to one's surprise,dosen't cease.请问该句中when从句表示的是什么时态?

Let us suppose that a child suddenly crosses the road in front of you.句子成分
是主谓宾还是主系表,什么时态

The road crosses the river by a very long b-------
根据首字母填空

an old bridge crosses the river为什么cross要接es?
是因为bridge也是第三人称吗?