单项选择题

It is not easy to see much difference between day and night because ______.

A. large modern cities are too big to control

B. citizens are obliged to take a wholly unnatural way of life

C. the sun was hidden by tall buildings

D. the noise made by cars, buses and trucks never stops

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单项选择题

A. She doesn’t know where it is. B. She dosen’t want to go fishing with the man. C. She knows how to go there. D. She will go even though it is far.

A. She doesn’t know where it is.
B. She dosen’t want to go fishing with the man.
C. She knows how to go there.
D. She will go even though it is far.

单项选择题

A. She’s a nurse. B. No, I’m sorry. C. In her office. D. She comes from Tokyo.

A. She’s a nurse.
B. No, I’m sorry.

C. In her office.
D. She comes from Tokyo.