________ is impossible to master a foreign language without much memory work．

A．This

B．That

C．Its

D．It

If we can ________ this speed, we will arrive there in about two days．

A．keep up

B．keep on with

C．keep to

D．keep with

－I have driven so long, and now I want to have a rest．

－________．It's my turn to drive．

A．Come on

B．No way

C．You are welcome

D．Go ahead

I find it quite ________ that none of you like the play．

A．surprised

B．astonished

C．astonishing

D．amusing

－Are you a teacher? You look like a teacher very much．

－________ , but I'm not now．

A．I was used to

B．I used to

C．I used to be

D．I'm used to

If there were no examinations, we would have ________ at school．

A．a happiest time

B．a more happier time

C．much happiest time

D．a much happier time

I'm sorry, I didn't mean ________ you．

A．hurting

B．hurt

C．hurts

D．to hurt

Make sure you have the car ________ by tomorrow．

A．fixed

B．fix

C．to fix

D．fixing

Nile River is the longest river ________ in the world?

A．that there is

B．which there is

C．which is

D．that is

－When ________ again?

－When he ________ , I'll let you know．

A．he comes; comes

B．he comes; will come

C．will he come; will come

D．will he come; comes