题目内容：
Thesentence"Handswentbackintotheair"means“__________”.
A．thestudentsputuptheirhandsagain B．thestudentsputdowntheirhands
C．thestudentsputtheirhandsbehindtheirbacksagain
D．thestudentsputtheirhandsinfrontofthem
参考答案：
答案解析：