The story tells us ________ hard working brings success．

A．that

B．what

C．which

D．those

The sports meeting will be held on time, ________ it rains．

A．if

B．unless

C．and

D．but

I’ll save enough money ________ buy a car．

A．so that

B．therefore

C．as a result

D．in order to

－Mum, could I have a rest now?Every thing I need to do is ________．

－Really?But you forgot to put your things away．

A．doing

B．to do

C．do

D．done

If we do not protect our world, one day the earth will be too polluted ________．

A．to live

B．to live on

C．for living

D．for living in

Let’s talk about the future world, ________?

A．don’t we

B．do we

C．should we

D．will you

The space shuttles travel fast, ________ the journey to Mars will probably be very ________．

A．and; uncomfortable

B．but; comfortable

C．and; discomfort

D．but; uncomfortable

－How hard this job is!

－You should make more persons ________ you．

A．help

B．to help

C．helping

D．be helped

________ robot is ________ useful machine, it can help you in many ways．

A．The, a

B．The, an

C．A, a

D．A, an

Guilin is ________ China．It’s a beautiful city．

A．in the north of

B．to the north of

C．in the south of

D．to the south of