将下列各句改为被动句。

1.We can finish the work in two days.   

The work _______ _______ _______ in two days.

2.The children will sing an English song.

An English song ______ ______ _______ by the children

3.You needn't do it now.                        

It ______ _______ _______ by you now.

4.Lucy sent me a New Year Card last week.

A New Year Card ______ ______ ______ me by her last week.

5.He made me do that for him.                      

I ______ ______ ______ that for him.

6.I have given this book to the library.        

This book ______ ______ ______ to the library.

7.Did he break the window yesterday?    

______ the window ______ ______ _____ yesterday?

数控加工程序是由若干程序段组成的，程序段由若干个指令代码组成，而指令代码又是由字母和数字组成的。