It is sometimes of great _____ to explain to the patient what is happening.

A．technique         B．signal             C．importance        D．freedom

It was _____ it raised so many difficult questions _____ the book took a long time to come out.

A．that; that          B．since; which       C．because; that      D．because; which

Their classroom is _____ than ours, that is to say, their classroom is as small as ours.

A．much bigger       B．much smaller       C．no bigger          D．less small

 It’s my favorite song and I will never _____ it.

A．be angry with                          B．get tired of

C．be associated with                       D．get tired out

There were not any track and field ______ for women in the Olympic Games until 1928.

A．incidents          B．accidents          C．events            D．affairs

The rule demands that everyone ______ quiet in the school library.

A．keeps            B．keep             C．will keep          D．should be kept

The scenery of Jiuzhaigou Valley _____ the tourists from all over the world.

A．appeals to         B．is appealed        C．appeals           D．is appealed to

The company ran into trouble when it tried to expand too quickly, _____ was that it was short of money.

A．some of them                          B．most of which

C．one of them                           D．part of which

—May I go out tonight?

—Of course you can, _____ you promise to be back before 10 o’clock.

A．as soon as         B．as well            C．as long as          D．as usual

The environment will be further polluted unless some measures _____.

A．are taken                             B．will be taken

C．are being taken                         D．should be taken