35. ____ 　all his friends and money gone, he felt totally hopeless.

　　A. For　 　　　　　B. Since　　 　　　C. Because　　 D. With

34.---Shall I lock the lab before I go home?

　 --- ____. I’ll check it myself later.

A.　　 Go ahead　 　　　　B. No problem. 　　C. No hurry　 　D. Don’t bother.

33. With the effects of global warming, trees ____ their leaves much later in the year.

　A. are losing　 　　　　　B. have lost　 　　C. lost 　　　　D. were losing

32.Tom is dismissed by his boss. What has become ____ him.

　A. from　 　　　　　　　B. to 　　　　　C. of　　　 　　D. /