题目

某实验室的光线比较暗，在使用显微镜时应选择（ ）     A.小光圈、平面镜    B.大光圈、平面镜    C.小光圈、凹面镜 D.大光圈、凹面镜 答案：DAs an exchange student, I have been staying in a host family in Beijing for the past five months. The parents are   36   in their mid-30s and the son just turned 5. In exchange for room and board, I teach their son   37  . Like in many of the other Chinese families, he’s an only child. And though he has   38  plastic trucks and boxes full of crayons, I don’t know   39   he has the time to play. When he’s not in the kindergarten, he’s taking after-school classes. On the weekends, the boy goes to more classes. He has one day off―Sunday. Compared to his schedule, I feel like my childhood was   40   a waste of time. I learned how to climb trees and draw cartoons. I wasn’t learning Chinese at his age. But he and lots of other children are learning English. Both his parents dream that he will have   41   jobs, higher pay, and bigger houses. The boy seems to take no interest   42   learning English. He doesn’t need a teacher, but a playmate. He is,   43  , only 5. When I think about my life as a 5-year-old, I know for sure I wasn’t half as   44   as he is. In the evening, when his parents   45   him to speak with me in English, he gets   46  . He lies on the floors, hides under the table and climbs on the furniture. When he finally stops   47  , and starts talking, it isn’t in English, but it isn’t in Chinese,   48  . He speaks in his own language. He   49   not be a very good student, but I’m not a great teacher. I just want to be his big brother   50   can speak in gibberish(胡言乱语) with him and help draw trucks, robots or spiders. 1. A. both             B. all              C. either           D. none 2.A. drawing           B. Chinese          C. English          D. playing 3. A. a hundred of     B. hundreds of      C. hundred of       D. hundreds 4. A. when             B. what             C. where            D. that 5.A. hardly            B. never            C. usually          D. almost 6. A. more             B. fewer            C. better           D. worse 7. A. with             B. in               C. for              D. on 8. A. after all        B. at all           C. first of all     D. all the time 9.A. busily            B. busiest          C. busier           D. busy 10.A. make             B. push             C. have             D. let 11. A. frustrated      B. relaxed          C. pleased          D. injured 12.A. move             B. to move          C. moving           D. moved 13.A. too              B. also             C. as well          D. either 14.A. can              B. may              C. must             D. need 15.A. who   B. whom C. whose    D. which