Safety in school has been of great concern because of frequent reports about accidents _______ students got injured or killed while in school.
A.in which | B.when |
C.that | D.for which |
推荐套卷
Safety in school has been of great concern because of frequent reports about accidents _______ students got injured or killed while in school.
A.in which | B.when |
C.that | D.for which |