单选题：A10-15minutes'exercisewillhelpyoubearaheavierbackpack.

题目内容：

A10-15minutes'exercisewillhelpyoubearaheavierbackpack. A．Right
B．Wrong
C．Notmentioned

参考答案：

答案解析：

Becauseofthepopularityoftheregion,itisadvisabletobookhotelsi

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DuringtheSecondWorldWar,allimportantresourcesintheU.S．wereallocatedbythefederal

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ThenumberofUnitedStatescitizenswhoareeligibletovotecontinuestoincrease. A．encou

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Formulatedin1823,theMonroeDoctrineassertedthattheAmericaswerenolongeropentoEuro

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