The discovery was made_______, which we hadn’t expected .
| A．on purpose | B．at present | C．in advance | D．by accident |
I didn't like aunt Lucy,who __________ without warning and bringing us presents.
| A．always turned up |
| B．has always turned up |
| C．had always turned up |
| D．was always turning up |
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 |