Of three people who travel together, there ________ someone who ________ be my teacher．

A．must have, might

B．must be, can

C．may be, could

D．may have, may

Information achieved from the libraries is sooner forgotten that ________．

A．from life

B．that from life

C．that of life

D．life

Protect earth, or good soil is ________ lost．

A．actually

B．gradually

C．hardly

D．life

Western art of the 19th century shows the influence of ________ Far East．

A．a

B．the

C．an

D．/

Swimmers must be very strong in order to build up speed because of the high resistance of the water．Runners, ________, must struggle against the heavy resistance of the air and ground．

A．generally

B．similarly

C．naturally

D．probably

－Did you see the American film last night?

－Oh, yes．It couldn’t have been ________ moving．

A．so

B．too

C．less

D．more

________ life in a new country can be difficult, it can also broaden a person’s view of the world．

A．If

B．Although

C．Because

D．While

We were interested in the weather because it ________ us directly——what we wear, what we do, and even how we feel．

A．benefits

B．affects

C．guides

D．effects

To make Beijing more beautiful, you ________ throw rubbish into rivers．

A．needn’t

B．can’t

C．couldn’t

D．mustn’t

The meeting will begin soon．I ________ go now．

A．must

B．need

C．can’t

D．should