The fact that smoking is harmful to health is____most smokers are quite aware of．

    A．what                   B．which                  C．where                    D．that

The day we had been looking forward to _____ at last.

_______, the gathering crowd burst into applauses.

A. On entering the hall                            B. When the hero entered the hall

C. The hero entered the hall                        D. No sooner had the hero entered

It didn’t surprise us at all         caused his success.

       A. why    B. that     C. how    D. what

Recently, the Chinese government gave some examples of _______ Dalai Lama’s visiting 

   foreign countries had affected China.

       A. that            B. what            C. how             D. whether

Evidence has been piled up _______ drinking water after getting up in the morning contributes to one’s health.

A. what                 B. which               C. if                      D. that

A major issue was put forward by some representatives at the conference ____ the teachers in the remote areas were underpaid.

A. whether            B. at which            C. where               D. that

There is growing tendency among middle-school students       they will do some voluntary work during their vacation.

       A．which       B．why  C．how  D．that

Are you ______ your son has difficulty in studying at school?

   A. aware of             B. aware that         C. knowing that                   D. aware of that

Having arrived at the railway station, ______.

A. it was found that the train had left                 B. the train had left

C. the train was found left                             D. he found that the train had left