We do not know how astronauts can ____ when they spend months in space without the protection of the atmosphere.
| A．get off | B．get up | C．get along | D．get in |
. --- My son is addicted to drugs. He isn’t hopeless, is he?
--- Yes, ______ he mends his way and starts all over.
| A．if | B．when | C．even if | D．unless |
. The ancient Chinese vases _______ display attracted lots of experts and collectors, some of whom suggested they______ on the next fair.
| A. on; displayed |
B. on; be displayed |
| C. in; displayed |
D. in; be displayed |
. Although their new factory building is still under ________ construction, we have already placed _______ order for 200 pairs of shoes.
| A．the ; an | B．a; an | C．/; / | D．/; an |
. --- I usually go there by bus. It is very crowded.
| A. Why not try to go |
B. Why not try going |
| D. Why try going |
D. Why try to go |
--- _______ there by train? It’s fast and cheap.
. The library’s study room is full of students _______ for the exam.
| A. busily prepared |
B. busy preparing |
| C. busily prepare |
D. are busily preparing |