成人英语三级考试

【单选题】The instructor had gone (over) the problems (many times) (before) the students (will take) the final examination.
A. over
B. many times
C. before
D. will take

网考网参考答案：D
网考网解析：
[分析] 过去完成时和另一从句连用；先发生的事用过去完成时，后发生的事用一般过去时。改“will take”为“took”。 查看试题解析出处>>