10. Each nation has many people who _________ take care of others.
A. volunteers B. voluntarily C. volunteer D. voluntary
11. The students failed in that competition because they didn’t understand the competition’s_____ clearly.
A. difficulties B. rules C. enjoyment D. spirit
12. Each group has to ________ five activities in all.
A. finish B. complete C. sponsor D. A and B
13. We ___________ dinner before we went to bed.
A. had B. were having C. had had D. have
14. He ________ a letter from his parents recently.
A. have received B. has received C. received D. had received
15. My students hope _______ into the football team of the school.
A. choosing B. being chosen C. to choose D. to be chosen
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