As is known to us all, _____ tiger is in _____ danger of becoming extinct.

A．the, a B．the, 不填

C．a(chǎn), 不填 D．不填, the

He spent too much time talking on ______ phone while we were all busy at _____ work.

A．the, 不填 B．a(chǎn), 不填

C．不填, 不填 D．the, the

As _______ unemployment is very high at the moment, it's very difficult for people to find _______ work.

A．the, 不填 B．不填，不填

C．the, a D．a(chǎn)n, the

The education of ______ young is always ______ hot and serious topic.

A．不填, 不填 B．the, a

C．不填, the D．the, 不填

I often have conversations with John over ______ telephone, while keep in touch with Tom by ______ letter.

A．不填；the B．不填；a

C．the；不填 D．the; a

考點：冠詞

-John has put forward _______ most challenging question for us to answer.

-Yes, it really is. I have never heard _______ harder one.

A．the; 不填 B．不填; the

C．the; the D．a(chǎn); a

"What about ______ school?" "It is as good, as anybody can see, _____ school as No 1 Middle School Attached to Hunan Normal University."

A．a(chǎn); the B．the; a

C．a(chǎn); a D．the; the

The market for ______ used computers is getting larger and larger as______ years go on.

A．不填, 不填 B．the, 不填

C．the, the D．不填, the

"Charley Oakley, ______ NBA All-star, hasn't missed ______ game in the past three years." "I can hardly believe it."

A．a(chǎn)n; the B．a(chǎn); the

C．the; a D．a(chǎn)n; a

In the market, vegetables are sold by _______ kilogram, I mean, by _______ weight.

A．the; 不填 B．不填; 不填

C．the; the D．不填；the