AIDS is said __________ the biggest health challenge to both men and women in that area over the past few years.
| A．that it is | B．to be |
| C．that it has been | D．to have been |
______, Carolina couldn't get the door open.
| A．Try as she might | B．As she might try | C．She might as try | D．Might she as try |
____ snacks and drinks, but they also brought cards for entertainment when they had a picnic in the forest.
| A．Not only they brought | B．Not only did they bring |
| C．Not only brought they | D．Not only they did bring |
Maybe you have been to many countries , but nowhere else such a beautiful palace .
| A．can you find | B．you could find | C．you can find | D．could you find |
Of the making of good books there is no end; neither ______ any end to their influence man’s lives.
| A．there is | B．there are | C．is there | D．are there |
I failed in the final examination last term and only then_____the importance of studies.
| A．I realized | B．I had realized | C．had I realized | D．did I realize |