The death of the great inventor means a great ________ to science．

A．tension

B．harm

C．loss

D．shortcoming

With a lot of homework to do this evening, Tom's mother will allow him to watch TV ________．

A．in no time

B．at one time

C．at no time

D．at a time

You ________ be too careful when crossing the busy street．

A．can

B．cannot

C．must

D．mustn't

The country ________ of some islands used to ________ to the UK．

A．consists; belongs

B．consisting; belonging

C．consisted; belonged

D．consisting; belong

The art centre is ________ used to be a factory, ________ millions of tractors were made．

A．what; where

B．where; where

C．what; which

D．where; which

The TV drama ________ the north of China during the anti-Japanese war．

A．is born in

B．is typical of

C．is different from

D．is set in

I have been searching for a painting to decorate my room, but ________ seems really difficult for me to find ________ I like．

A．that; one

B．it; it

C．that; it

D．it; one

There is no power like ________ power of confidence, and there is no student as competitive as ________ student who trusts his own abilities．

A．the; a

B．a; the

C．/; a

D．the;/

Many managers have access to your computer and can watch ________ you are doing on your screen in real time．

A．how

B．if

C．what

D．when

________ for your brother, I would not have gone to see Mr．Wang．

A．If it is not

B．Were it not

C．Had it not been

D．If they were not