Witnessing the explosion(爆炸) in a chemical plant in Kunshan is the most frightening experience ______ I have ever had.
A.that | B.when | C.which | D.who |
推荐套卷
Witnessing the explosion(爆炸) in a chemical plant in Kunshan is the most frightening experience ______ I have ever had.
A.that | B.when | C.which | D.who |