“May I go home, sir?”she said _______ low voice.

[　　]

The new train has no wheels _____ no engine. It can travel fast enough ______ planes do.

[　　]

Better use should be ________ new technologies ________ our life easy and comfortable.

[　　]

Don't waste time ________ with him; he will never change his mind.

[　　]

--Was the speech long enough?

--No, it wasn't _____ enough.

[　　]

A. much too long

B. too much long

C. too long much

D. quite long

When having an exam, try to make _____ mistakes as possible.

[　　]

A. as few

B. as fewest

C. as fewer

D. so few

While having our dinner, _____ .

[　　]

A. the doorbell rang

B. we heard the doorbell rang

C. we heard the doorbell ringing

D. the doorbell was heard to ring

--Can I help you?

--I'd like to buy a present for my father's birthday, ________ at a proper price, but of great use.

[　　]

--Do you have a big library?

--No, we don't-- ________, not as big as yours.

[　　]

Man's shopping can be and often is completed in five minutes, which is less than a quarter ________.

[　　]

A．that of a woman's

B．of a woman

C．of that of a woman

D．of a woman's