单项选择题

"Those shirts are very expensive."
"Do you know ______ "

A．how much cost him
B．what do they cost
C．they cost how much
D．how much they cost
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单项选择题
We ______ you came to visit our lab tomorrow.
A．had better
B．rather than
C．would rather
D．will rather
单项选择题
I enjoy playing basketball and then ______ .
A．taking a bath
B．to take a bath
C．take a bath
D．took a bath
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