I study math by lots of exercises. A. didB. doing C. do D. did——青夏教育精英家教网——

题目内容

I study math by ____ lots of exercises.

A. did
B. doing
C. do
D. did

试题答案

B

相关题目

I study math by ____ lots of exercises.

A. did
B. doing
C. do
D. did

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