托业考试

试题来源：托业-1
【单选题】 The electricity went out ______we were making coffee.
A．(A) so
B．(B) because of
C．(C) while
D．(D) for

参考答案：C
网考网解析：
While is a subordinate conjunction that indicates simultaneous action. Choices (A) a... 查看试题解析出处>>