If it is convenient ____you , I want to ask you to help me repair the roof of the kitchen. on Friday .
A. to B. for C. with D at
.
After the quarrel, I tried all my best to fix the misunderstanding between us, but all my efforts seemed ______.
| A．in trouble | B．in case | C．in time | D．in vain |
.
-- Better get down to your work, Jack.
--- _____________.
| A．It’s my pleasure | B．Not to mention it |
| C．Mind your own business | D．You’re welcome |
.
If you use another method to solve this problem, you’ll probably ______ it.
| A．make | B．get | C．finish | D．take |
.
My hometown,_______ I spent my happy childhood, has changed a lot.
| A．when | B．where | C．which | D．since |
.
-----Can I smoke in this hall?
----No, you can’t. If you_____ , please go to the smoking room.
| A．should | B．might | C．can | D．must |