更多"The last half of the nineteenth cen"的相关试题:
[单项选择]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
[单项选择]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
[单项选择]The last half of the nineteenth century _________ the steady improvement in the means of travel.
A. has witnessed
B. witnessed
C. is witnessed
D. has been witnessed