His math is poor,you must ________ him.A.try help B.trying to help C.try to help
人气：195 ℃ 时间：2019-11-13 18:37:38
解答
C.
他的数学不好,你一定要尽力帮助他
must是情态动词,情态动词后用动词的原型所以删除B
try to do sth.是尽力做某事的意思,.
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