复合句You’d better begin the preparations now and the most important thing is to chec

题目

复合句You’d better begin the preparations now and the most important thing is to chec
You’d better begin the preparations now and the most important thing is to check ______ the laboratory can
be used for the tests.A.where B.when C.what D.that
为什么选B

答案

意思决定的.不是A,因为where意思不对,这里主语是实验室,所以不能用where了不是C,因为what在从句是做主宾表的,而句子结构完整了,所以,不能用what不是D,要去查一下,不是确定的,所以,不用that.“去查一下什么时候实验室...