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吉大19秋学期《基础英语（二）》在线作业一
一、单选题（共 25 道试题，共 100 分。

）
1. The Grand Canal, a man-made waterway first built __________ is the longest of its kind throughout the world.
A. in the 6th century
B. in the 6th century BC
C. in the 4th century BC
D. in the 4th century
参考标准答案：B
2. We must now decide _____ the form of our answer.
A. to
B. for
C. on
D. before
参考标准答案：C
3. I didn't know his telephone number; otherwise I ________ him.
A. telephoned
B. had telephoned
C. would have telephoned
D. was telephoning
参考标准答案：C
4. Hotel construction reached _______ in 1920s.
A. an all-time plain
B. an all-time peak
C. an over-time peak
D. an over-time peal
参考标准答案：B
5. "Tom is a teacher" "So _______."
A. was I
B. am I
C. do I
D. I am
参考标准答案：B
6. In the second half of the twentieth century, one of the two factors。