题目内容
（请给出正确答案）
[主观题]
Only before the show starts __________ enter the music hall.
A．can you
B．you can
C．should you
D．you should
提问人：网友lixin080108
发布时间：2022-01-07
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A、To show what may happen to the development of medicine.
B、To show how many different ways to cross the sea.
C、To teach us to think outside the box when developing a new medicine.
D、To teach us building a bridge is not the best way.
