题目：Is______some German friends visited last week？A．this schoolB．this the schoolC．this school
Is______some German friends visited last week？
A．this school
B．this the school
C．this school one
D．this school where
为便于理解，改写本句话：ThisistheschoolthatsomeGermanfriendsvisitedlastweek．不难看出，作表语的theschool是先行词。that引导了定语从句，因为that同时又作visited的宾语，所以被省略了。其他选项结构不对。
