I think that ____ very difficult to learn.
| A．the politics is | B．politics is | C．politics are | D．the politics are |
—He is fluent in English because he once stayed in London。
—Really ?How long ____ there ?
| A．did he live | B．has he lived | C．had he lived | D．does he live |
___ Dad away ,Mum had to shoulder the burden of the family .
| A．As | B．With | C．For | D．Because |
You _____ pay too much attention to your handwriting ,as it is very important.
| A．mustn’t | B．needn’t | C．can’t | D．won’t |
—Do you mind my opening the window?
—Well , I’ d rather you _____.
| A．didn’t | B．not | C．won’t | D．don’t |
When exposed to stress ,in _____ form , all of us react both chemically and physically.
| A．whichever | B．whatever | C．however | D．whenever |