We the opportunity to go to France, had it not been for Mary’s help.
| A．would have lost | B．should lose | C．might lose | D．must have lost |
If you can make what the teachers teach ________, you’ll make rapid progress.
| A．yours | B．yourself | C．you | D．your |
_______ has recently been done to provide more buses for the people, a shortage of public vehicles remains a serious problem.
| A．What | B．Though what | C．In spite of what | D．However what |
When a giraffe has ______ drink, it has to stand with its front legs wide apart in order to reach ______ water easily.
| A．不填；不填 | B．a; the | C．the; 不填 | D．不填；the |
If we ___________some measures, we might have prevented the environmental pollution.
| A．take | B．had taken | C．took | D．have taken |
–May I smoke in the room?
--No, you______________. It’s a non-smoking room..
| A．mightn’t | B．won’t | C．needn’t | D．mustn’t |