30.—Why did you leave the lights burning?
—Heavens! I guess I__________to turn them off.
| A．would forget | B．had forgot | C．forgot | D．have forgot |
computers play an important part in people’s daily life , they still have some disadvantages.
| A．Since | B．As | C．If | D．While |
He had his camera ready ________ he saw something that would make a good picture .
| A．even if | B．if only |
| C．in case | D．so that |
------ Could I use your car tomorrow morning ?
------ Sure .I a report at home.
| A．will be writing | B．will have written |
| C．have written | D．have been writing |
The secretary worked late into night, ________ a long speech for the president.
| A．to prepare | B．preparing |
| C．prepared | D．was preparing |
With her dearest jewels ________, she was almost mad.
| A．missed | B．gone |
| C．being stolen | D．were lost |