I know Mr. Brown; we ______ to each other at an international conference.

    A. are introduced             B. are been introduced

    C. were introduced           D. had been introduced

Mr Smith suggested the problem worth paying attention to ________ at the meeting.

A. should discuss  B. was discussed   C. being discussed    D. be discussed

Mr. Johnson starts to work very early in the morning and goes on working until late in the afternoon ________a break at midday.

　　A. with　　　　 B. for　　　　　　C. as　　　　　　 D. through

Mr Smith was driving fast to take his wife to the nearest hospital because their baby was________.

A.on its way    B.in the way      C.by the way　D.out of the way

I can't give my son the leading position.______，he is too young；secondly，I want Mr.Smith to have the job.

A．After all  B．For example   C．In the end D．To begin with