The light is still on. They ___ to turn it off when they left the room.
| A．must forget | B．could have forgotten |
| C．may forget | D．must have forgotten |
Give me a chance, ________ I’ll give you a wonderful surprise.
| A．if | B．or | C．and | D．While |
----Could I use this dictionary ?
----_____. It’s a spare one .
| A．Good idea | B．Just go ahead |
| C．You’re welcome | D．You’d better not |
—What did Father ask Lily yesterday?
—Father asked her ______.
| A．did she pass the exam |
| B．when did she pass the exam |
| C．whether she had passed the exam |
| D．how she has passed the exam |
—Did the boy break the window ______?
—No. They did it when they were playing football.
| A．by accident | B．on purpose |
| C．at dusk | D．as usual |
There was ______time ______ I hated to school.
| A．a, that | B．/, when |
| C．a, when | D．the, when |