----I’m going to the United States.
---- How long ____you ____in the States ？
| A．are; stayed | B．are; staying |
| C．have; stayed | D．did; stay |
.
--- What do you think our guests ___________ be doing at the moment?
--- They must be enjoying themselves at the party.
| A．can | B．must | C．should | D．would |
.
Only in this way ______ our goals.
| A．we can reach | B．can we arrive | C．we can arrive | D．can we reach |
.
11. Tom wanted to play football after school, but Jack told him ______.
| A．not to | B．not to do | C．not do it | D．do not |
.
You can take as many as you can because they are free of ______.
| A．fare | B．charge | C．money | D．pay |
.
I don’t think ______ possible to master a foreign language without much memory work.
| A．that | B．which | C．it | D．this |