根据汉语意思完成句子。

1．不要在床上看书,这对你的眼睛有害.

Don't read in bed.___ ___ ___your eyes.

2．胡先生每天花半小时吃午饭.

It___ Mr. Hu___ ___ half an hour lunch every day.

3．火星在望远镜里似乎像一个火球.

Mars ___ ___a fireball in a telescope.

4．我要睡觉,你能把音乐声关小吗?

I'm trying to sleep. Could you please___ ___the music?

5．任何人不允许违反规则.

No one___ ___ ___break the rules.

合同系统中在哪个节点不允许作废合同（）

A.合同订立准备

B.合同订立发起

C.合同履行

D.合同签署