The aging population in China will cause ________ heavy burden on ________ whole society in the future．

A．the; a

B．the; the

C．a; the

D．/; /

Being out of work and having two young children, they found it impossible to ________．

A．make it

B．make ends meet

C．make every effort

D．make preparations

I was speaking to Tom on the phone about our class outing ________ suddenly we were cut off．

A．as

B．while

C．before

D．when

My mother ought to stop work; she has a headache because she ________ too long．

A．read

B．has been reading

C．is readin

D．had read

After the earthquake, the injured were cared ________ in the hospitals or taken by air to the hospitals in the neighboring cities．

A．of

B．for

C．after

D．with

________ it is true that a successful businessman or inventor will usually become rich, many other people who are outstanding in their field take little notice of personal possessions．

A．While

B．Since

C．Unless

D．If

The film Harry Potter IV is ________ for children above 12 and adults for it contains horror and violence．

A．promised

B．intended

C．admitted

D．permitted

My parents will move back into town in a year Or ________．

A．1ater

B．after

C．about

D．so

It was ________ back home after the experiment．

A．not until midnight did he go

B．until midnight that he didn’t go

C．until midnight when he didn’t go

D．not until midnight that he went

－ Do you mind if I visit you now and talk about the advertising campaign, Mr．President ?

－ I'd rather you ________ at the moment．

A．are not coming

B．don’t come

C．didn’t come

D．will not come