______ herself with other girls, she feels she is quite lucky.

A. Comparing  B. Compared             C. To compare          D.Being compared

Please do me a favor —______ my friend Mr. Smith to Youth Theater at 7:30 tonight.

A. to invite                 B. inviting                 C. invite                     D. invited

Ladies and gentlemen, please ______ seated until the plane has come to a complete stop.

A. remain            B. keep                  C. go                     D. get

In class, fewer of the students who are not ___ their studies sometimes ____the dying robots,not listening attentively.

 A. accustomed to ; are functioned as          B. accurate in; function

C. sceptical of; are functioned               D. addicted to; function as

Not until the train pulled into the next station ______ her suitcase gone.

A. Mary had found                                        B. had Mary found?

C. did Mary find                                                      D. Mary found

The one concern for parents and students is ______ if the student pursues their university education in a foreign country, the student will not have the opportunity to establish social contacts in China.

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

______ it have been the failure to pick up directions from the ground control that caused the air crash?

A. Must             B. Could                      C. Would                     D. Should

When it______ air pollution, Beijing faces the three “C” s-----cars，coal and construction，which lead to Beijing's thick air pollution.

A. refers to                B. comes to               C. happens to           D. speaks to

Wang Pin is an advanced worker in our company. He _______ for four years in Yangzhou University.

A. studied                  B. has studied           C. had studied          D. has been studying

The silence of the library is sometimes broken by a sudden cough or the sound of pages______.

A. turning                   B. turned                    C. being turned        D. having turned