单项选择题

AIDS is said ______ the number one killer of both men and women over the past few years in that region.

A．being
B．to be
C．to have been
D．having been

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单项选择题

What courses are you going to do next semester I don't know. But it's about time ______ on something.

A．I'd decide
B．I decided
C．I decide
D．I'm deciding

单项选择题

It is futile to discuss the matter further, because ______ going to agree upon anything today.

A．neither you nor I are
B．neither you nor me is
C．neither you nor I am
D．neither me nor you are

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