根据提示完成句子。

1. Parents should not be too ____ (严格) teenagers.

2. We shouldn't ____ more____ (注重) to our clothes than to our studies.

3. ____ (目前), the vacations are too short.

4. ____ (前几天), my friends and I talked about the school rules.

下列有关实验装置进行的相应实验，能达到实验目的的是

图1            图2              图3              图4

A．用图1所示装置除去Cl₂中含有的少量HCl

B．用图2所示装置蒸干NH₄Cl饱和溶液制备NH₄Cl晶体

C．用图3所示装置制取少量纯净的CO₂气体

D．用图4所示装置分离CCl₄萃取碘水后已分层的有机层和水层