Rock-climbing is a breathtaking activity, very popular nationwide among young people, ______ cooperation as well as courage plays an important role.
A. who B. where C. which D. of which
Students are required to go out in couples, especially in the evenings, with friends ______ they get into trouble.
A. even if B. if only C. in case D. when
After a long vacation, Mike came back _________.
A. freshly and strongly B. fresh and strong
C. being fresh and strong D. to be fresh and strong
This sweater fits me, but I can’t afford to buy __________. I have to choose _________ which is cheap enough for me.
A. it; that B. that; it C. it; one D. that; the one
He suggested the problem worth paying attention ______ at the meeting.
A. to be discussed B. to being discussed C. to discuss D. to discussing
I fixed my eyes upon the newcomer, wondering whether I ________ him somewhere before．
A. saw B. has seen C. had seen D. would see
