Being able to afford ______ drink would be ______ comfort in those tough times.
| A．the the | B．a a | C．a / | D．/ a |
.
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 |
.
-----I’m terribly sorry to have put you through so much trouble.
-----________. I know you didn’t mean to.
| A．Forget it | B．No trouble |
| C．All right | D．You’re welcome |
.
It was ______ the 19th century_____ heat was considered to be a form of energy.
| A．not until; that | B．until; that |
| C．not until; when | D．until; when |