Question

is this factory___we visited last year

is this factory___we visited last year is this the factory___we visited last year a where b in which c the one d at which 这两个有什么区别啊 ——————is mentioned above ，the number of the students in senior high school is increasing。 这题用as是什么用法？？

Answer 1

1、C。this factory是主语，is是系词，后接表语或表语从句，由于从句谓语visited后面缺少宾语，因此不能选where来引导表语从句，只能考虑选项C，这个选项结合定语从句引导词省略的用法。 2、应该用which、that或不填任何引导词。主语是this，the factory是表语，后接定语从句，引导词在从句中作宾语，可以省略。 3、置于句首的非限制性定语从句，引导词只用as。