________, such spelling mistakes might have been avoided.

[　　]

A．You had been more careful

B．Had you been more careful

C．Would you be more careful

D．You were more careful

-Why didn't anybody ring me up?

-Sorry, I lost your telephone number; otherwise. I ________long before.

[　　]

A．had rung you up

B．must have rung you up

C．would have rung you up

D．should have rung you up

The world's supplies of copper ________.

[　　]

A．have been gradually being exhausted

B．are gradually exhausting

C．are gradually exhausted

D．are being gradually exhausted

________ his choice of two jobs, the man decided to take the one which was nearest to his house.

[　　]

A．When offered

B．When he is offered

C．When being offered

D．When offering

So excited and overjoyed ________ at the good news that I couldn't say a word on the afternoon of March, 6.

[　　]

It is strange that he ________ interest in his work.

[　　]

Great changes ________ in the city, and a lot of four-star hotels ________ .

[　　]

A．have been taken place, have been set up

B．have taken place, have been set up

C．have taken place, have set up

D．have been taken place, have set up

从所给的四个选项中选择最佳答案

How ______ can the key ______?　　　

[　　]

A．long, makes　　　　B．soon, is made

C．long, be made　　　D．soon, be made

[　　]

A． Many informations have 　　　B． Some of the information are

C． A lot of information has 　　　D． Much of information is

[　　]

A． too expensive, take　　　B． very high, turn

C． too high, bring　　　　　D． too big, let