- 试题详情及答案解析
- It ____ that all the students were having lessons in the teaching buildings when the earthquake occurred.
| A．happens | B．was happened |
| C．was happening | D．happened |
- 答案：D
- 试题分析：考查时态。句意：当地震发生时，所有的学生碰巧正在教学楼里上课。It happened/happens that...碰巧发生某事，根据句意可知是过去的事情，用happened，故选D。
考点：考查时态