He ________ keenly, but says little．

A．look

B．observes

C．watch

D．see

He is a soldier ________ by leg wounds．

A．disabled

B．disable

C．disablement

D．disability

If you are ________ about Australian cities, just read the book written by Dr Johnson．

A．interested

B．anxious

C．upset

D．curious

Don't be too ________ about things you're not supposed to know．

A．strange

B．amusing

C．curious

D．conscious

She ________ the organization of the whole scheme．

A．undertake

B．undertook

C．took

D．understudy

We had a party to ________ Mother's silver wedding．

A．congratulate

B．celebrate

C．win

D．defend

Some passengers complain that it usually ________ so long to fill in travel insurance documents．

A．costs

B．takes

C．spends

D．spares

－Mum, I've been studying English since 8 o'clock．________ I go out and play with Tom for a while?

－No, I'm afraid not．Besides, it's raining outside now．

A．Can't

B．Wouldn't

C．May not

D．Won't

I ________ pay Tracy a visit, but I'm not sure whether I will have time this Sunday．

A．should

B．might

C．would

D．could

－I don't mind telling you what I know．

－You ________．I'm not asking you for it．

A．mustn't

B．may not

C．can't

D．needn't