may act as a cause of these illnesses.A、StressB、RelaxationC、Happiness

Interviewer：Sorry for the inconvenience it may cause you.Interviewee：__________．

A.You’re welcome

B.Never mind

C.Nothing else

D.It’s OK

There being no cause for alarm, you______in such a panic yesterday.

A．need not act

B．did not need to act

C．need not have acted

D．did not need to have acted

There being no cause for alarm, you ______ in such a panic yesterday.

A．need not act

B．did not need to act

C．need not have acted

D．did not need to have acted

Under such conditions light and atoms may act as if they ______ waves.

A) be B) are C) were D) will be

Removing water from underground may cause earthquakes.

A．Y

B．N

C．NG

The cause of the accident may never (discover) ______ in spite of the effort of the police.

Why may the FDA rescind its approval of Avastin？

A．Because it may cause breast cancer to metastasize to other organs

B．Because it did not keep women alive.

C．Because it may cause side effects.

D．Because its toxicity outweighs its benefits.