Shops should ________ open till late in the evening．

A．be remained

B．remain

C．leave

D．keeps

The camera(相机)isn't ________．It still ________ where I ________ it a month ago．

A．missed; lies; lay

B．missing; lies; laid

C．gone; lays; laid

D．lost; lays; lay

A satellite is ________ object traveling in ________ orbit round another object in ________ space．

A．the;/; the

B．an; an; a

C．the; an; a

D．an; an;/

________ has helped to save the drowning girl is worth praising．

A．Who

B．The one

C．Anyone

D．Whoever

________ she couldn't understand was ________ fewer and fewer students showed interest in her lessons．

A．What; why

B．That; what

C．What; because

D．Why; that

________ made the school proud was ________ more than 90％ of the students had been admitted to key universities．

A．What; because

B．What; that

C．That; what

D．That; because

－I've asked him to let me go．

－But does he ________ you to go?

A．let

B．agree

C．allow

D．promise

________ is hard is to do well all one's life and never do anything bad．

A．He

B．It

C．That

D．What

He made up his mind to devote his life ________ pollution ________ happily．

A．to prevent; to live

B．to prevent; from living

C．to preventing; to live

D．to preventing; from living

Mary wrote an article on ________ the team had failed to win the game．

A．why

B．what

C．who

D．that