According to the director, the idea ________ we can play video games and receive e-mails without sitting at a keyboard will come true．However, it is unclear ________ this kind of computer will be on sale and ________ it will cost．

A．which; that; what

B．/; whether; how much

C．that; when; what

D．that; that; how much

Johnson had made up his mind to give it up, but on ________ second thoughts he determined to try ________ third time．

A．/; a

B．/;/

C．a; a

D．the; a

－How unhappy your roomate looks!

－Yes, but he’s not willing to tell me what it is ________ is troubling him．

A．what

B．which

C．as

D．that

On my father’s birthday, I gave him a special present, ________ I had spent my own money buying for the first time．

A．that

B．what

C．one

D．it

John is ________ of the students who ________ able to get the first place．

A．the one; are

B．the only one; is

C．one; is

D．only one; are

Every boy and girl as well as some teachers who ________ to visit the museum ________ asked to be at the school gate before 6∶30 in the morning．

A．are; are

B．is; is

C．are; is

D．is; are

It’s nearly seven o’clock, Jack ________ be at here at any moment．

A．must

B．need

C．should

D．can

Bob ________ hard, otherwise he ________ in his exam．

A．can’t have worked; wouldn’t have failed

B．can’t work; wouldn’t have failed

C．mustn’t have worked; wouldn’t fail

D．mustn’t work; would fail

－Why didn’t you tell me?

－I ________ tell you－you just forgot．

A．do

B．does

C．did

D．must

Look at the trouble I am in!If only I ________ your advice．

A．followed

B．would follow

C．had followed

D．should follow