“What________you________yesterday evening?” “I________some reading.”
A. did; did; did
B. do; do; do
C. did; do; do
D. did; do; did
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“What was the boy doing?”“He left, then right, then left.”
A. looked
B. is looking
C. was looking
D. will look
When I was at school, I________to the library every day.
A. go
B. went
C. was going
D. have gone
I first met Lisa three years ago. She________at a book store at the time.
A. had worked
B. worked
C. was working
D. has worked
液压控制阀分类按用途可分为（）。
A. 方向控制阀
B. 压力控制阀
C. 流量控制阀
D. 电动控制阀
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