765. --- You must come back every month.

--- Yes, I __________________.

A. will　 B. must　 C. should　 D. can

764. Today, the forests have almost gone. People must ___________down too many trees.

A. stop to cut　　　　　　 B. stop from cutting

C. be stopped to cut　　　 D. be stopped from cutting

763. Which of the following does paper burn in?

A. CO₂　 B. N₂　 C. O₂　 D. He

762. ___________comes from cows.

A. Wool　 B. Chicken　 C. Pork　 D. Milk

761. In the bookshop, a reader asked the shopkeeper ____________Who Moved My Cheese was an interesting book.

A. that　 B. how　 C. what　 D. if

760. --- Dad, when will you be free? You agreed to go to the seaside with me four days ago.

--- I am sorry, Jean. But I think I will have a _____________holiday soon.

A. four-days　 B. four-day　 C. four days　 D. four day

759. ___________ you free last night?

A. Were　 B. Was　 C. Are　 D. Do

758. He __________ two thousand trees since 1985.

A. plants　 B. planted　 C. will plant　 D. has planted

757. --- Which of the two English dictionaries will you buy?

--- I'll buy _________ of them, so I can give one to my friend, Hellen.

A. either　 B. neither　 C. all　 D. both

756. Ann is so careful that she always goes over her exercises to _______________there are no mistakes.

A. look for　 B. make sure　 C. find out　 D. think about