With the development of science and technology, there is no doubt _________Chinese astronauts will land on the moon.
| A．whether | B．which |
| C．that | D．what |
AIDS is said _______ the biggest health challenge to both men and women in that area over the past few years.
| A．that it is | B．to be | C．that it has been | D．to have been |
________ the problem of land erosion(侵蚀) getting more serious, the government is searching for a way to deal with it.
| A．As | B．When | C．With | D．If |
There are three students punished, two girls _______ .
| A．include | B．including | C．included | D．includes |
In face of danger, we need to stay _______. Only in this way can we come up with good solutions.
| A．still | B．quiet | C．calm | D．silent |
— What about ______ bike?
— Do you think it all right to buy him that bike as ______ birthday gift?
| A．a; a | B．the; a | C．a; / | D．the; / |