. —— What can I do for you?
——I’d like to buy a gift for my mother’s birthday, one at _________ proper price but of ___________ use and it’d better be __________ surprise.
| A．the; /; a | B．the; a ; / | C．a; the; / | D．a; / ; a |
When you read the book, you’d better make a mark _____ you have any questions.
| A．at which | B．at where | C．the place | D．where |
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 |
________ the problem of land erosion(侵蚀) getting more serious, the government is searching for a way to deal with it.
| A．As | B．When | C．With | D．If |
There are three students punished, two girls _______ .
| A．include | B．including | C．included | D．includes |
In face of danger, we need to stay _______. Only in this way can we come up with good solutions.
| A．still | B．quiet | C．calm | D．silent |