When you stand on the top of the mountain and overlook the surrounding scenery, you will find it is ______ to climb it up with effort.
| A．worth | B．worthy |
| C．possible | D．worthwhile |
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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 |
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My hometown,_______ I spent my happy childhood, has changed a lot.
| A．when | B．where | C．which | D．since |
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-----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 |