题干
—Will you watch the program Running Man in Zhejiang Star-TV tonight? ——Yes, of course. It one of the most popular shows since last October.
A：was
B：became
C：has been
D：has became
答案(点此获取答案解析）
C
(a∈R，i为虚数单位)是纯虚数，则实数a的值为( )