Money（）as it goes from person to person.

单项选择题They are two dollars each but if you buy ten, you get a（）of ten per cent.

A.discount
B.recession
C.depression
D.discharge

单项选择题Gary has planned to take a tour around the Great Lakes in the coming summer vacation and（） great pleasure from the visit.

A.acquires
B.anticipates
C.recalls
D.reckons

单项选择题The survival of civilization, as we know, is（）threat.

A.with in
B.under
C.to wards
D.upon

单项选择题The wise man exercises（）in his behavior and enjoyments.

A.limitation
B.interest
C.restriction
D.restraint

单项选择题The police will give you a ticket if you（）the speed limit.

A.break
B.reject
C.suspend
D.exceed

单项选择题I guess the whole paper has to be rewritten; only the first few paragraphs may be（）

A.sustained
B.contained
C.maintained
D.retained

单项选择题Very few plants will（）without water.

A.flourish
B.fade
C.stem
D.cultivate

单项选择题Years of（）labor had hardened his muscles.

A.survival
B.mental
C.restless
D.manual

单项选择题Fertilizer will（）the growth of these tomato plants.

A.accomplish
B.accelerate
C.accumulate
D.account

单项选择题Professor Collins was（）of the latest developments in physics because he had been in hospital for several months.

A.unconscious
B.negative
C.robbed
D.ignorant