－I have just received another message, telling me I have won a big prize．

－Don't jump on it．You ________．

should be cheated

are being cheated

are cheating

must have cheated

－Does your brother serve in the army?

－No, not now．But he ________ in the army for 8 years．

would serve

was serving

had served

served

－What do you think of the blind man?

－I've never seen a man with ________ sense of touch．

the better

a better

a good

the best

－Have you got any job offers?

－No．I ________．

am waiting

had been waiting

have waited

waited

－Now that you like the MP5 players very much, isn't it a good idea to get one?

－Well, I'd like to but I can't afford ________ MP5 player at present．

a such expensive

that expensive an

that an expensive

so cheap an

－You didn't wait for Professor Zhang last night, did you?

－No, we ________．He didn't return home at all．

couldn't have

needn't have

didn't need to

should have

－How come you are late for school again?

－________．

Because I missed the bus

By bus and then on foot

Please excuse me

It's quite wrong

－It's a shame to ask you to lend me more money, but…

－________．You really need money to keep on with your education．

Forget it

Don't be silly

No way

Don't mention it

－That's the third time he's won the award in this field．

－Yes．He ________ his maximum potential in the past decade．

explored

is exploring

has been exploring

has explored

－Are you going to stay overnight?

－Not ________ it's really necessary．

unless

if

until

since