单项选择题

Since the introduction of the new technique, the production cost（）greatly.

A．reduces
B．has been reduced
C．is reducing
D．is reduced

相关考题

I'll take down your name and address in case you（）as a ...

单项选择题I'll take down your name and address in case you（）as a witness.

A．are needed
B．have needed
C．need
D．were needed

The riot is said（）by the government's negligence of the...

单项选择题The riot is said（）by the government's negligence of the people's welfare.

A．to have been caused
B．being caused
C．to be caused
D．to cause

He had no idea how much a room in this hotel（）. A．was c...

单项选择题He had no idea how much a room in this hotel（）.

A．was charged
B．charged
C．was charged for
D．charged for