—Can those　　　　 at the back of the classroom hear me??

—No problem.

A.seat　　　 B.sit　　　　 C.seated　　　　　　 D.sat

Seventy percent of traffic accidents ____ because the drivers drink too much.

　　A. is caused B. have caused C. are caused D. has caused

The week following Christmas Day, many families get together to g _______ the New Year and think about the past.

Our teacher is always busy preparing lessons until 11 o’clock at night,        we students have gone to sleep.

A. that time       　　B. by which time　　 C. by that time     　 D. which time

______ the safety of gas, the government has checked the city’s gas supply system thoroughly.

   A. To ensure    B. Ensuring     C. Having ensured    D. To have ensured

--- _______ Mr. Brown _______ this week?　　　　 　

--- No. he is on holiday.

A. Has; worked　 　 B. Does; work　　 C. Did; work　 　 D. Is; working

It is required that the plan________out firmly.

A.be carried out 　 B.must be carried 　　　 C.will be carried 　　　 D.carries

The roads are lined　　　 trees，which have been planted to hold　　　 the strong winds from the north.　

A. along; to　　　　 B．on；up　　　 C．in；against　　 　　 D．with；back

There are three basic ways of _____ language to writing, and all known graphic systems use one or a combination of these.

　　A. committing 　　 B. attaching 　　 C. comparing 　　　D. relating

—Excuse me,sir.Would you do me a favor??

—Of course.What is it??

—I 　　　 if you could tell me how to fill out this form.?

A.had wondered　　　 B.was wondering?

C.would wonder　　　 D.did wonder?