We must do whatever we can ______ those who are in trouble.
We must do whatever we can ______ those who are in trouble.
A、to help
B、help
C、helping
D、to have helped
【正确答案】：A
【题目解析】：to do 表目的，句意：我们必须尽我们所能去帮助那些有困难的人
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