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【单选题】
When an absolute advantage exists, what should the producer with the absolute advantage do?
A.
Produce the item for which he does not have the absolute advantage
B.
Produce both items
C.
Produce the item for which he does have the absolute advantage
D.
Produce neither item
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】When you grow up. you will be fully ______the importance of good habits.
A.
know about
B.
understand
C.
aware of
D.
aware about
【单选题】When it was his turn to deliver his speech,________,he walked towards the microphone.
A.
nervously and embarrassingly
B.
nervous and embarrassedly
C.
nervously and embarrassing
D.
nervous and embarrassed
【单选题】When the swan _________ its intention to soar through the air, the sparrow reacted with apparent scorn.
A.
asserted
B.
assumed
C.
claimed
D.
disclaimed
【单选题】When I started to read, I was blown away. (翻译成中文)
A.
当我开始阅读时，我的书被风吹到地上了。
B.
当我开始阅读时，我大为震惊。