As time went by, they found their efforts to help students . [ ] A. showed off B
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![As time went by, they found their efforts to help students . [ ] A. showed off B](/pic/43_1434043.jpg)
As time went by, they found their efforts to help students ________.
[ ]
A. showed off
B. took off
C. put off
D. paid off
试题答案
D