The flu is believed ________ by viruses that like to reproduce in the cells inside the human nose and throat.

A．causing

B．being caused

C．to be caused

D．be have caused

The first use of atomic weapons was in 1945, and their power ________. increased enormously ever since.

A．is

B．was

C．has been

D．had been

Children under 12 years of age in that country ________. be under adult supervision when in a public library.

A．must

B．may

C．can

D．need

The accident is reported to have occurred ________the first Sunday in February.

A．at

B．on

C．in

D．to

I don't ________rock 'n' roll. It's much too noisy for my taste.

A．go after

B．go away with

C．go into

D．go in for

________ is reported in the newspapers, talks between the two countries are making progress.

A．It

B．As

C．That

D．What

________on-going division between English-speaking Canadians and French-speaking Canadians is ________ major con-cern of the country.

A．The; 不填

B．The；a

C．An；the

D．An；不填

We cannot figure out ________,quite a number of in- sects, birds, and animals are dying out.

A  that

B．as

C．why

D．when

There's ________cooking oil left in the house. Would you go to the corner store and get_

A．little；some

B．little; any

C．a little；some、

D．a little；any

—John, there is ________ Mr．Wilson on the phone for you.

—I’m in ________ bath．

A．a；the

B．the；a

C．a； 不填

D．the； 不填