Seeing the chemical ________ to the sunlight, Mr. Lee warned the workers to be careful when dealing with it.
A.to expose | B.exposing | C.exposed | D.being exposed |
相关知识点
推荐套卷
Seeing the chemical ________ to the sunlight, Mr. Lee warned the workers to be careful when dealing with it.
A.to expose | B.exposing | C.exposed | D.being exposed |