---- My baby has a heart trouble. ---- Did the doctor find it difficult ?A. in treatingB.

发布时间：2020-08-16 11:43:41

---- My baby has a heart trouble.          ---- Did the doctor find it difficult      ?
A. in treating
B. treating
C. for treating
D. to treat

网友回答

A. in treating
B. treating
C. for treating
(答案→)D. to treat
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