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【单选题】
Corn and potatoes are originated from ______A.
Africa
B.
Europe
C.
the Americas
D.
European
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举一反三
【单选题】If you want to get a high score you must first______.
A.
gain the skills of using your guns
B.
wipe out a score tanks
C.
hunt a number of enemy's saucers
D.
kill some supertanks or missiles
【单选题】________， please try your best to solve the problem in time.
A.
Ought you get into trouble
B.
Must you get into trouble
C.
Can you get into trouble
D.
Should you get into trouble
【单选题】If you want to get a ------- on your purchase, you must present a copy of the original receipt along with the product.
A.
refund
B.
registration
C.
purchase
D.
limit
【多选题】绿色包装材料除了具有一般包装材料的保护性、加工操作性、外观装饰性的性质外,还具有()的特点。
A.
材料性能价格比合理；
B.
材料具有优质、轻量化；
C.
对人体健康及生态环境无害；
D.
废弃后能迅速自然降解，不破坏生态平衡；
【单选题】If you meet troubles in your life, you must try to _________the troubles.
A.
turn over
B.
get over
C.
look over
D.
come over
【单选题】You must _____ your studies and get ready for the college entrance examinations.
A.
concentrate on
B.
centre in
C.
devote to
D.
devoted to
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