There are some trees near our school. They last Monday. A. waterB. wateredC. have watered

问题补充：

There are some trees near our school. They last Monday.

A. water

B. watered

C. have watered

D. were watered

答案：

A. water

B. watered

C. have watered

(答案→)D. were watered

解析：句意:在我们学校附近有一些树，上个星期一他们被浇了水。water在这里是一个动词，意思是浇水。根据句意可知，they在这里代替的是trees，故它和动词water之间构成被动的关系，这里应该用被动语态；又因为句中有last Monday这个时间状语，故应该用一般过去时。故选D；A是一般现在时；B是一般过去时；C是现在完成时。