The ________ physicist has been challenged by others in his field．

A．respectable

B．respectful

C．respective

D．respecting

I would appreciate ________ back this afternoon．

A．you to call

B．you call

C．your calling

D．you’re calling

They set out ________ the heavy rain stopped．

A．at once

B．instant

C．immediate

D．as soon as

Please answer my question ________．

A．instantly

B．at once

C．immediately

D．instant

You should avoid ________ vegetables that are grown with too many chemicals．

A．eating

B．to eat

C．eat

D．having eaten

I’d like to have Mrs Chen because her teaching is well ________ and clear．

A．set up

B．formed

C．attended

D．organised

My brother is lively and ________, but he is not very patient．

A．powerful

B．energetic

C．active

D．enthusiastic

It is quite ________ that she can’t remember her son’s birthday．

A．amusing

B．amazing

C．amuse

D．happy

Ladies and gentlemen, please fasten your seat belts．The plane ________．

A．takes off

B．is taking off

C．has taken off

D．took off

－________ leave at the end of this month．

－I don’t think you should do that until ________ another job．

A．I’m going to; you’d found

B．I’m going to; you’ve found

C．I’ll; you’ve find

D．I’ll; you’ve find