Question

【题目】___ I was talking on the phone, David came in.

A.BecauseB.WhileC.IfD.So

Answer 1

【答案】B

【解析】

句意：我在打电话时戴维进来了。

根据I was talking on the phone和David came in.之间的关系，可知是当我打电话时，戴维进来了；Because因为，While当……时候，If 如果，So因此；故选B。