His father is ________ engineer and he works ________ research．

A．an, on

B．an, with

C．the, on

D．a, with

Thanks for your invitation, but I'm so sorry I can't go．I need to ________ my baby at home．

A．take away

B．take off

C．take care of

D．take out of

I couldn't do it ________ your great help．Thanks a lot!

A．with

B．without

C．for

D．to

There is ________ news about this movie star in the newspaper．Where can I get some?

A．many

B．a few

C．a lot

D．little

Could you say it again? I can't understand ________ you are talking about．

A．how

B．when

C．what

D．which

The man called his professor for help because he couldn't solve the problem by ________．

A．herself

B．himself

C．yourself

D．themselves

I always tell my students ________ on the road because it's really dangerous．

A．not to play

B．to play not

C．not playing

D．not play

It will be 2 years ________ we see each other again．

A．after

B．before

C．since

D．when

The teachers hope all of us can hand ________ our homework ________ time every day．

A．up; in

B．out; on

C．on; in

D．in; on

It ________ me about 10 days ________ painting the walls．

A．took; to finish

B．cost; finishing

C．took; finishing

D．spent; to finish