I'm going to get _______ this afternoon.
| A．these letters mailing |
| B．mail the letters |
| C．to mail these letters |
| D．him to mail the letters |
.
-----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 |
.
Don’t you think ti is unfair for about two thirds of the population to have no_____ to health care?
| A．access | B．basis | C．entrance | D．guarantee |
.
When Bill Gates decided to stop schooling and created Microsoft in 1975, he ______ law at Harvard University.
| A．studied | B．had studied | C．was studying | D．would study |