请问谁能把这两句翻译成英语？？？

1.Now here we come to class twelve grade seven.
2.Now welcome our three honoured guests to have self-introductions.

A.Now we come to class7 great12. B.Please let these three guests introduce themsleves .

now we are here in class 12 grade 7

let's welcome our three graciou guests to do their self-introductions .

1. We are here at Class 12 Grade 7.
2. Please welome our three distinguished guests to introduce themselves.