1、It was ______ he was too clumsy to drive a car that Jim hadn't learned to drive.

　　A.as　　B.for　　C.because　　D.because of

　　2、Do you remember ______ to Mrs. Robert during the visit?

　　A.to introduce　　B.having introduced　　C.being introduced　　D.to have introduced

　　3、The secretary and the manager ______ present at the meeting yesterday.

　　A.was　　B.were　　C.have been　　D.has been

　　4、Each one of us who______ now living is destined to witness remarkable scientific discoveries.

　　A.is　　B.are　　C.have being　　D.were

　　5、 ______ that they are fresh from university, the young people have done a good job.

　　A.Giving　　B.Because　　C.Given　　D. As