_____________, the speaker began his speech. 选哪个a. the students having taken their seats.b. having taken their seats.c.the students have taken their seats.d.taking their seats.
问题描述：
_____________, the speaker began his speech. 选哪个
a. the students having taken their seats.
b. having taken their seats.
c.the students have taken their seats.
d.taking their seats.
答
选b. 前面的动作要和后面的the speaker一致，而且动作有先后关系，所以前面要用完成时 后面用过去时
答
a 学生落座后,演讲者开始讲话.
b和d的逻辑主语是speaker,所以不对
c 是完整的句子,没有and 连接,也不对