When all those present___he began his lecture.(D) A.sit B.set C.seated D.were seated为什么选择D 没懂
问题描述：
When all those present___he began his lecture.(D)
A.sit B.set C.seated D.were seated
为什么选择D 没懂
答
这是个时间状语从句，前面WHEN部分是一个从句，所以应该是要是一个完整的句子.
He seated himself = he was seated＝he sat
这里应该用were seated
所以选D
答
seat要用被动语态，句义要求用一般过去时。
选项b改成sat也对，sat是sit的过去式。
答
动词seat的用法就是：be seated,表示就座.
sit的过去式是sat,这里没有,所以只能选D.