Jim came back early last night. It was not yet eight o'clock ________ he got home.
| A．before | B．that | C．when | D．until |
As many as nine tourist attractions are visited free on National Day, and you can choose _________ suits you best.
| A．whatever | B．whichever | C．whenever | D．wherever |
China is becoming stronger and stronger and _________ an important role on the international stage in recent years.
| A．plays | B．was playing | C．played | D．has been playing |
Instead of blaming others for our failure, we should _________ what to do next and try our best to succeed in the future.
| A．figure out | B．carry out | C．take out | D．put out |
Look, the ground is wet. It must have rained last night, _________?
| A．wasn’t it | B．hasn’t it |
| C．didn’t it | D．mustn’t it |
Air pollution results in stronger greenhouse effect, which __________ leads to global warming. We must take measures to prevent pollution before it is too late.
| A．generally | B．gradually | C．gently | D．usually |