题目内容
【题目】Last term he had problems________math.
A.to learn
B.learn
C.to learning
D.learning
【答案】D
【解析】have problems doing sth做某事有困难。
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题目内容
【题目】Last term he had problems________math.
A.to learn
B.learn
C.to learning
D.learning
【答案】D
【解析】have problems doing sth做某事有困难。