Each of the students, working hard at their lessons, ________ the book.— So have I. [ ]

Hainan is a very good island. It’s the second ________island in China.

As we all know, ____________ cloning is the creation of cells or the whole animals using DNA from ____________ single “parent”.

下列词语中加点的字，读音全部正确的一组是（　　）

____ he works hard, I don’t mind when he finishes the experiment