The teacher told the students ________the machine because it’s dangerous．

A．not to touch

B．not touch

C．touch

D．don’t touch

I think they’ll ________ work out this math problem．

A．can

B．able to

C．be able to

D．may

－Can you guess if they ________to play games with us?

－I think they’ll come if they ________free．

A．come, are

B．will come, will be

C．will come, are

D．come, will be

Mr．Green says ________ they will go back to England．

A．when

B．where

C．that

D．if

－Have you caught the thief?

－Yes．He ________ last night．

A．caught

B．was caught

C．has been caught

D．was catching

We are all very tired, but________ of us would stop．

A．some

B．none

C．no one

D．neither

－Haven’t you finish your work?

－________．

A．Not yet

B．Not still

C．Not already

D．Ever

Mrs Li always has many ways to encourage us________ English as much as possible．

A．to speak

B．speak

C．to say

D．say

－Would you please turn down ________music?

－Sure, I’ll go and do it．

A．the

B．an

C．a

D．/

－Could you please sweep the floor?－________．I’m busy with my homework．

A．Yes, sure．

B．Why not?

C．Sorry, you can’t．

D．Sorry, I can’t．