Such poets as Shakespeare____widely read，of whose works，however，some______difficult to understand．
| A．are；are | B．is；is | C．are；is | D．is：are |
—I want to know if I__________ smoke here.
—No, you _________.Could you see the sign “NO SMOKING” there?
| A．can; needn’t | B．must; can’t | C．shall; won’t | D．may; mustn’t |
Everyone has periods in their lives ______ everything seems very hard.
| A．when | B．where | C．which | D．that |
I can’t thank you ______ much because without your help I ______ have won the first prize.
| A．too; wouldn’t | B．very; shouldn’t | C．that; might not | D．so; couldn’t |
The big city has always been the dream career destination of college students. But of late a trend of heading back home ________a part of future job considerations.
| A．has become | B．had become | C．becomes | D．will become |
A severe drought over the past months has left 7.5 million people without ________ drinking water in two southwestern Chinese provinces.
| A．frequent | B．private | C．permanent | D．adequate |