单项选择题

Mary regretted( )to John’s birthday party last Sunday.

A．not going
B．not to go
C．not having been going
D．not to be going
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单项选择题
Millions do it. in this sentence do it refers to( ).
A．feeling uncomfortably hot on the equator
B．flying over the North Pole
C．flying over the equator
D．making homes on the equator
单项选择题
What problems does sport have
A．Some women athletes are actually men
B．Some women athletes are given hormone injections
C．Women and men do not run or swim in the same races
D．It is difficult to check whether women athletes are really women
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