题目列表(包括答案和解析)
The last half of nineteenth century the steady improvement in the means of travel.
A.has witnessed B.was witnessed C.witnessed D.is witnessed
The last half of the nineteenth century _____ the steady improvement in the means of travel.
A. has witnessed B. was witnessed C. witnessed D. is witnessed
The last half of the nineteenth century ________ the steady improvement in the means of travel.
A. has witnessed B. was witnessed
C. witnessed D. is witnessed
A. has witnessed B. was witnessed
C. witnessed D. is witnessed
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