I study math by lots of exercises.A. didB. doingC. doD. does

发布时间：2020-08-22 15:48:36

I study math by      lots of exercises.
A. did
B. doing
C. do
D. does

网友回答

A. did
(答案→)B. doing
C. do
D. does
解析：我通过许多练习来学习数学。本句中by是介词，表示通过某种方式，后面接名词或者动名词作宾语，故选B。
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