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 |
–---Where does Mr. Smith live?
------He has been in London he end of the war.
A by
B. at
C. in
D. since
-----Did you find the missing couple in the mountain yesterday?
-------No, but we _ to get in touch with them ever since.
A have tried
B. had tried
C. have been trying
D. had been trying
--- Do you think a child should follow _______his parents say?
--- That depends.
| A．no matter what |
| B．whatever |
| C．however |
| D．Whichever |
Take care of yourself! You can leave the hospital when you have completely _______from your illness.
| A．returned |
| B．rescued |
| C．replaced |
| D．recovered |
There are so many kinds of delicious cakes that I can't decide_______．
| A．what to buy |
| B．to buy what |
| C．which to buy |
| D．to buy which |