单选题：Boysmissmoreschoolhourseachyearduetodental-relatedillness.

题目内容：

Boysmissmoreschoolhourseachyearduetodental-relatedillness. A．Right
B．Wrong
C．Notmentioned

参考答案：

答案解析：

A10-15minutes'exercisewillhelpyoubearaheavierbackpack.

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

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