—The country has already sent up an unmanned spacecraft to the moon.

—Yes. Chang’e I       to the moon last October.

A．has been sent

B．has sent

C．was sent

D．sent

板纸的种类分为（）。

A.箱板纸

B.草板纸

C.白板纸

D.黑板纸

E.打印纸