There are some health problems that，when ________ in time，can become bigger ones later on.
| A．not treated |
| B．not being treated |
| C．not to be treated |
| D．not having been treated |
You'd better get all the work _________ before you leave.
| A．finishing | B．to finish |
| C．finished | D．be finished |
At midnight the enemy attacked _________.
| A．without warning | B．without notice |
| C．without permission | D．A or B |
They had to_________ before they finished the course because they were not well disciplined.
| A．drop in | B．drop out |
| C．drop off | D．drop by |
四、Multiple choice(单项选择)15分
It looks as if they are going to _________ us a lot of money for the concert hall.
| A．demand | B．cost | C．charge | D．ask |
________ needs further discussion whether we'll build a laboratory or not.
| A．The matter | B．He |
| C．It | D．We |