Question

5. This is the museum______ we visited last year. A. where B. in which C. which D. in that

5. This is the museum______ we visited last year.
A. where B. in which C. which D. in that

Answer 1

选C。
1.先看主句。后面的从句修饰的是主句中的the museum，而这个词在主句中充当表语（因为它在系动词is后面）
2.从句可看成“We visited the museum last year”，用来对主句的the museum进行说明修饰，作定语，为定语从句
3.定语从句的引导词只有which（先行词为物时），who和whom（先行词为人时），还有that（人和物都可以用），故此处可知选C

Answer 2

选C。visit是及物动词，后边不用加介词。又因为in which=where，所以不能选A和B，定语从句中介宾短语为介词+which或介词+whom，所以不能选D.

Answer 3

选C.which，此句为定语从句，从句中visit缺宾语，所以用关系代词作visit的宾语

Answer 4

C
还是定语从句
在从句中充当宾语,连接词用which

Answer 5

C