The boy keeps coughing, and the doctor tells the parents it still needs more time to ________ the reason．

put off

figure out

make up

look through

He talks about China pavilion as though he ________ it himself this summer holidays．

had visited

were visiting

visited

have visiting

________ house in this district has heating in winter seasons．

No way

Not every

Not all

All not

Having failed in many attempts, the bird ________ managed to escape from the cage．

suddenly

naturally

immediately

eventually

I tried more than once to persuade the taxi driver to slow down, but he just ________ listen．

shouldn’t

mustn’t

couldn’t

wouldn’t

Try the new cleaner．Just a few minutes every day, ________ you could have shining floors and furniture．

but

and

or

so

It is such a difficult problem ________ no one can work out．

as

that

so

thus

The United States is ________ leading producer of ________ mohair, along with South Africa and Turkey．

a; the

the; the

a; 不填

the; 不填

What he wants is ________ his mother as quickly as he can; and what he must do is ________ to the hospital at once．

to see; going

to see; go

see; to go

see; go

You job here is only ________, for you will be removed from it when we have a proper post for you

original

accurate

initial

temporary