we are worried about the housing conditions in the host fami

We worried about ______ he was in good health.

A．whether

B．if

C．that

D．what

　　For years scientists have been worried about the effects of air pollution on the earth’s natural conditions. Some believe the air inside many houses may be more dangerous than the air outside. It may be one hundred times worse.
　　Indoor air pollution can cause a person to feel tired, to suffer eye-pain, headache and other problems. Some pollutants（污染物） can cause breathing disorders, diseases of blood and even cancer, Most scientists agree that every modern house has some kind of indoor pollution. People began to notice the problem in the early 1970s. It is that when builders began making houses and offices they did not waste energy. To do this they built buildings that limited the flow of air between inside and outside. They also began using manmade building materials. These materials are now known to let out harmful gases. As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for building— green plants. Scientists do not really know how plants control air pollution. They believe that a plant’s leaves absorb or take in the pollutants. In exchange the plant lets out oxygen through its leaves and through its tiny organizations on its roots. Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square metres of space. Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants. Having green plants inside your house can make it a prettier and more healthy place.
　　小题1:Generally speaking, indoor air pollution may be more harmful than the air outside because ________.

A．the man - made building materials let out dangerous gases inside houses

B．there may be more harmful gases outside houses

C．the flow of air indoors is limited

D．indoor air pollution can make a person seriously ill

　　小题2:The most effective way to clean the air is to use different kinds of plants because________.

A．they may let out more oxygen which people need

B．they can absorb different kinds of the harmful indoor chemicals

C．they can take in all kinds of indoor pollutants

D．they can make your house prettier and more healthy

A: Jane, you look so worried. 小题1: _____________________________________?
B: I lost a book about computer science.
A: Is it the one you borrowed from the city library?
B: Yes, it is. But I can’t find it now.
A: 小题2:______________________________________. Where did you lose it?
B: Over there, on the playground. I left in a hurry without taking it.
A: 小题3:_______________________________?
B: Yes, I did. But now I haven’t found it yet.
A: Don’t worry. Maybe someone took it by mistake. 小题4:______________________________?
B: That’s a good idea. Thank you very much.
A: 小题5: ________________________________________.

What worried the child most was ______ to visit his mother in the hospital.

A．his not allowing	B．his not being allowed
C．his being not allowed	D．having not been allowed

A father is very worried about his son, 小题1:_____acts like a coward. So his father paid a visit to the master and 小题2:_____(ask) him to train his son.
The master said, “I promise I’ll be able to train your child into a real man in three months.”
Three months later, his father came 小题3:______(pick) the child. The master arranged a match 小题4:_______the child and his coach to show the three-month training result.
At Round One, the child 小题5:_________ (knock) down and fell to the ground. He stood up to meet the challenge. But he was knocked down again, and once again he stood up to fight... this was repeated six times.
The master asked his father, “Do you think your child’s performance is小题6: ____of a man?” The father said, “I feel ashamed for 小题7: ____! I never expected that he would be so weak after three小题8:______ (month) training.” The master said, “I don’t agree with you, and I regret that you only see 小题9: ___ surface of things. You have not seen the courage and perseverance 小题10:__ your son. This is the very spirit of a man!”

—Ann, I am worried I’m getting fatter. What shall I do?
—I think you should eat________ food and do more exercise.

A．more

B．less

C．much

D．little

Look! Sonia looks worried. There must be ________ wrong with her.

A．nothing

B．something

C．anything

D．everything