- 试题详情及答案解析
- Bob called to tell his mother that he couldn’t enter the house, for he ________ his key at school.
| A．had left | B．would leave |
| C．was leaving | D．has left |
- 答案：A
- 试题分析：考查时态。原意是鲍勃打电话给他妈妈说房子进不去，因为之前他把钥匙落在学校了。可知把钥匙落在学校的动作发生在他给他妈妈打电话之前，called为过去时，因而所选的的动词为过去完成时，故选A。
考点：考查时态变化