根据横线后的标点连词成句。

1. had better, hot food, you, not, eat

                                                                                .

2. for, you, long, shouldn't, a, time, play 

                                                                                .

3. I think, should, twice, take, she, these pills, a day

                                                                                .

4. were, why, for, again, you, late, school

                                                                                ?

5. with, hot tea, some, had better, honey, you, drink 

                                                                                 .

下列关于数据加密的密文说法错误的是（）

A.按某种算法处理后的不可读代码

B.通过解密才可以读取

C.只能在输入相应的密钥之后才能显示出本来内容的代码

D.由明文取反得到，再次取反可以返回到密文