—My cousin said, “I went to a concert three days ago.”

—My cousin told me that _______   ________ a concert __________.

A．he; had gone to ; three days before.

B．he; went to; three days ago

C．I ; had gone to; three days ago

D．I; went to ; three days before

在用加权平均股价法计算股价指数时，可以作为权重的变量有______。

A．股票成交量

B．股票总市值

C．股票的发行量

D．股票的换手率