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(��ʴ) 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
— What about ______ bike?
— Do you think it all right to buy him that bike as ______ birthday gift?
A. a; a B. the; a C. a; / D. the; /
