Our country did a lot about the drunk-driving, and it took some time ____ the situation got better.
| A．after | B．since | C．unless | D．before |
The teacher bought many books for her students, which _____ 500.
| A．added | B．added to | C．added up | D．added up to |
My younger brother dreams ________________ a spaceman.
| A．to become | B．of be become | C．of becoming | D．becoming |
Is he honest? I find ____ hard to believe what he said.
| A．one | B．it | C．/ | D．that |
— Have you been here before?
— Yes. This is the third time that I ______ to Shanghai.
| A．come | B．came | C．have come | D．had come |
The number of the teachers who ______ cars in our school ____ increasing very fast.
| A．own; is | B．owns; is | C．own; are | D．owns; are |