. He was just about to give up and return to his bedroom for a good rest ________ he had a bright idea.
A.but | B.while | C.until | D.when |
相关知识点
推荐套卷
. He was just about to give up and return to his bedroom for a good rest ________ he had a bright idea.
A.but | B.while | C.until | D.when |