——You certainly can’t find him today, he’s flown to Japan for the art show.

——Oh, I see, that is ________ he asked some days off.

A．why

B．when

C．where

D．what

The number of smoker has fallen ________30% this year, ________ with last year.

A．by; comparing

B．at; compared

C．by; compared

D．at; comparing

In my opinion more work does not ________ more men.

A．call on

B．call at

C．call for

D．call up

Among the famous scientists in the USA, one scientist ________ four ________ from China.

A．of; is

B．of; are

C．in; is

D．in; are

If the bottle of gas ________ fire, the whole building may ________ down.

A．is caught; burn

B．catches; be burned

C．is caught; be burned

D．catches; burn

——Little Tom got an “A” in the exam.

——________ he’ s been so happy these days.

A．No wonder that

B．I wonder why

C．It is a wonder that

D．Because

The chair is ________, please take it away.

A．in this way

B．in the way

C．on the way

D．by the way

Nowadays computers are used in ________ hope of taking ________ place of many workers.

A．the; 不填

B．a;不填

C．the; the

D．a; a

It is said that cloth is sold by ________ in Canada.

A．yard

B．yards

C．a yard

D．the yard

If you drive from the airport, go on the motor- way and follow the ________ to the city.

A．points

B．signs

C．plans

D．ways