. I ____ to the top of the tree, but I fell off it and hurt my leg.
A. must have climbed B. was able to climb
C. could have climbed D. should have climbed
. He is rather difficult to make friends with, but the friendship of his, _________,is truer than that of anybody else’s.
A. once gained B. while gaining C. if gains D. after gained
--- I’ve lost the game again.
--- ____! It’s not that bad!
A. Cheer up B. I’m sorry C. It doesn’t matter D. Oh, my goodness
. You should remember the cause and avoid it the next time you _______the same situation.
A. come out B. come about C. come up D.come across
So difficult __________ it to adapt to the academic requirements of a Western university that I determined to take a preparation course.
A. I have felt B. have I felt C. did I feel D. I did feel
.____ you prefer, I’ll give it to you. But we haven’t any other models for you to choose from.
A. Whatever B. Whenever C. Whichever D. However
