Teachers recommend parents __________ their children under 12 to ride bicycles to school for safety.
| A.not allow |
| B.do not allow |
| C.mustn't allow |
| D.couldn't allow |
The computer systemsuddenly while he was searching for information.
| A.broke down | B.broke out | C.broke up | D.broke in |
___ the room, the nurse found the tape-recorder ___.
| A.Entering; stealing | B.Entering; gone |
| C.To have entered; being stolen | D.Having entered; to be stolen |
As we joined the big crowd I got _____ from my friends.
| A.separated | B.spared | C.lost | D.missed |
Scientists have many theories about how the universeinto being.
| A.came | B.was coming | C.had come | D.would come |
Mr. Leea plan to reduce water pollution, which all the people present at the meeting thought highly of.
| A.put off | B.put on | C.put forward | D.put away |