It’s too cold today. Tell him _________the window.

给下面语句排序，衔接恰当的一项是（ ）①因为较弱的电磁辐射，也会对人的神经系统与心血管系统产生一定的干扰。②人的大脑和神经会产生微弱的电磁波，当周围电器发出比它强数百万倍的电磁波时，人的神经活动就会受到严重干扰。③即使在不太强的电磁波环境中工作和生活，人也会受到影响。④如果长时间处于这种强电磁波的环境中，人会出现头痛，注意力不集中、嗜睡等症状，强电磁辐射会使心血管疾病加重、神经系统功能失调。

The hotel was nice; the weather was warm; the beacheswere beautiful____ I’d say it was a great vacation

n go out,you promise tobe back before 10 o’clock.

I saw Helen in the school just now.— It ______ be Helen. She has gone to the shopping center with her sister.