托业考试

根据网考网考试中心的统计分析，以下试题在2017/10/27日托业考试习题练习中，答错率较高，为：71%
【单选题】 ______ Dr. Rossi hired the new assistant, the office has become more organized.
A．(A) When
B．(B) Before
C．(C) While
D．(D) Since

网考网参考答案：D，答错率：71%
网考网试题解析：
Since is the correct subordinate conjunction showing cause and effect. Choice (A) shows cause and effect but would need the past tense in the main clause to be parallel. Choice (B) is incorrect because of the present perfect use of have become in the main clause. Choice (C) means although or during. 查看试题解析出处>>