— How much do you charge for the iPhone?
— Well,it cost me $ 400,but I’ll ________ 20% as it’s no longer new.

A．reduce to	B．decrease to
C．knock off	D．cut off

— Someone wants you on the phone.
— ________ nobody knows I am here.

A．Although	B．And
C．So	D．But

— What about the protection of these new machines?
— Let’s keep the surface ________ dust by putting a cover over them.

A．far from	B．apart from
C．free from	D．away from

The 90’s people seem to have enjoyed the great benefits ________ about by the great level of cultural and
economic development.

A．brought	B．bringing
C．to be brought	D．having brought

It is widely acknowledged in foreign companies that employees should be ________ in terms of innovation capability.

A．examined	B．evolved
C．evaluated	D．encouraged

— David is a green hand at such things.
— But I believe he is quite ________ to the task.

A．relevant	B．accessible
C．equal	D．unique

Fred let ________ that he was prepared to leave company when the new manager took office.

A．secret	B．slip
C．promise	D．standard

— I wonder what makes you a good salesperson.
— I ________ as a waiter for three years,which contributes a lot to my today’s work.

A．serve	B．served
C．have served	D．had served

— Helen,are you going Io the airport to pick up Jack the day after tomorrow?
— ________ tomorrow night.I would go.
A. Were he to come back    B. If he was about to come back
C. Had he come back D. If he would come back