新概念英语1 （ 81-90课）总复习练习一、 选择题40分1. -Who has been to Australia? - I _.A. did B. was C. have D. had 2. -Its nice _ you to help me, Bob . -My pleasure. A. for B. to C. with D. of3. _ the help of my mother, I catch up with my classmates. A. for B. to C. with D. of4. The Greens _ China for five years.A. have been to B. have been in C. have gone to5. By the time I came back, they _ up ten meters.A. have climbed
