—Howdidshegetinfected?—Shethev

—How did she get infected?
—She _______ the viruses without any protection．

A．exposed to	B．had exposed to
C．was exposed to	D．been exposed to

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I have a lot to say in relation ______ _the affair.

A．with

B．by

C．to

D．in

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A．seated, pointing	B．sitting, pointing
C．seating, pointed	D．seated, pointed

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Ten professors______ the medical team to look into the cause of the disease.

A．composed

B．consist of

C．make up

D．forms

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A．had to persuade	B．had persuaded
C．had persuading	D．had persuade

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“I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”

A．must be

B．must have been

C．might be

D．can have been

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