_____more and more forests destroyed, some animals are facing the danger of dying out.
A. With B. By C. As D. For
David’s effort was ______, because he won the first prize in the English speech contest, _____ made his classmates surprised.
A. paid off; which B. paid back; it C. paid for; that D. paid up; he
．We have got a heavy snow there in my hometown this winter, which is a sign that this year _____ to be another good one for harvests.
A. tells B. means C. promises D. intends
—Who______ it be that is knocking at the door?
—It ______ be Father, but I’m not sure.
A. can; must B. can; may C. must; can D. may; must
The Smith’s family, which __________ a large one, ____________visit BeiJing this summer.
A. are, are going to B. is, are going to C. is, is going to D. are, is going to
My old father began to study computer science at the age of sixty in order that he might ___ times.
A. come up with B. keep up with C. end up with D. put up with
