—Have you seen ____ iphone? I left it on the desk this morning.
—Is it ____ white one? I think I saw it somewhere.

A．an; the	B．the; the
C．an; a	D．the; a

________of the people on the Net ________China's economy is among the strongest in the world.
A. Four fifth; believes   B. Four fifth; believe
C. Four fifths; believe   D. Four fifths; believes

—Sorry. I didn’t break the plate______.
—It’s OK. Don’t worry about it.

A．on purpose	B．no longer
C．at present	D．as usual

Mr. Black has been teaching English in a middle school _____ he came to China.

A．for ever	B．ever since
C．ever before	D．long before

He commanded that all the gates _____when it was getting dark in case thieves came in .

A．were shut

B．must be shut

C．could be shut

D．be shut