I'll love you till the earth stops circling.

After YAMGLIWEI succeeded in circling the earth ______ our astrounauts desire to do is walk in
space.
A.whatB.whereC.thatD.how
为什么选D

同义句转换 After Yangliwei succeeded in circling the earth ..
1.After Yangliwei succeeded in circling the earth ,what our astronauts to do is to walk in space
.After Yangliwei succeeded in circling the earth ,_____ ______ our astronauts desire to do is ____
they can walk in the space

Gliese 581g is the sixth planet to be found circling a dwarf star some 20 light-years away,in the constellation of Libra.On paperit looks good – three times the mass of the Earth with possibly a rocky surface and enough gravity to hold on to an atmosphere.
The researchers also promised shirt-sleeve weatherin some regions,but not everywhere.One side of the planet is almost always in sunshine; the other almost always in darkness and estimated temperatures range from minus four degrees Celsius to a very hot 71 degrees.A year meanwhile would go by in just 37 days.
Of course,whether life could really be supported on Gliese 581g will need much more investigation and,most probably,technologies which don't exist yet.But the astronomers say planet hunting is getting easier and they were surprised how quickly they detected the tell-tale signsof this distant body,using ground-based telescopes.
21.Which of the following is correct about Gliese 581g?
A.It is a dwarf star with gravity.
B.It is a planet like the earth.
C.It was discovered many centuries ago.
D.It is very close to the earth.
22.What does Gliese 581g look like?
A.It has the mass of the sun.
B.It has about the same mass as the earth and its atmosphere.
C.Its rock and atmosphere are about three times the mass of the earth.
D.It is heavier than the earth and has a rocky surface.
23.Which of the following is correct about the gravity of Gliese 581g?
A.It fixes the mass on.
B.It is too small to keep anything on the ground.
C.It is enough to hold on to an atmosphere.
D.It helps Gliese 581g to balance between the earth and the sun.
24.What does shirt-sleeve weatherprobably mean?
A.So warm that a jacket is not needed.
B.Changeable.
C.Cold.
D.Extremely cold.
25.How was Gliese 581g found?
A.A scientist discovered it on the way to the moon.
B.Some scientists found it with a telescope on the shuttle.
C.It was found using telescopes on the earth.
D.It was found with the help of a computer.

Circling of key words or phrases
按语法讲应该是：关键词或短语上面的圈圈
可以衍伸为：在关键词或短语上画圈圈
是这样理解么?

1、After Yang Liwei succeeded in circling the earth ,____ our astronauts desire to do is walk in space
为什么填what 能不能翻译一下
2、What makes me feel worried is ____ singing stars are centered on by masses of teenagers today
为什么填that 翻译下
3、When the Internet was ereated in 1969 ,only a few people knew about it .that"s _____it came into existence as a secret US goverments project
填because,为什么不填WHY呢
4、One of the most important questions they had to cinsider was ____ of public health
填that 为什么,句子成分能分析下么