题目内容

When the mother came in, the baby __(sleep).

A. will sleep
B. was sleeping
C. slept
D. skeeo

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He used to __(swim)when he was young.

A. swim
B. swimming
C. swam
D. swum

He told me that he had __(be ) to the USA three times before.

A. being
B. was
C. to be
D. been

After he had finished all his work.he__(go ) home.

A. goes
B. went
C. to go
D. going

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