统一成为我国历史发展的趋势是在[ ]
A．春秋时期
B．西周时期
C．战国晚期
D．秦汉时期
答案：C
I _____ him to give up drinking, but he wouldn't listen to me. [ ]
A. persuaded
B. tried to persuade
C. advised to persuade
D. tried to advise
Is this the sixth factory ____________ you visited yesterday? [ ]
B. which
C. where
D. Both A and B
