托业考试

试题来源：托业-4
【单选题】 Mr. Goa ______the proposal before he looked at the guidelines.
A．(A) writes
B．(B) had written
C．(C) has written
D．(D) will write

参考答案：B
网考网解析：
An action that is completed before another past action uses the past perfect tense. Choice (A) is the ... 查看试题解析出处>>