10. We must water the flowers every day.　　

The flowers must ________　 ________ (by us) every day.

9.Did they build a bridge here a year ago?　　　

　　　 _________ a bridge _________ here by them a year ago?

8.I have given this book to the library.　　　

This book _______ 　________ 　_________to the library.

7. He made me do that for him.　　　

I　 _______ 　________ 　_________ 　______that for him.

6. People use metal for making machines.　　　

Metal ________　 ________ for making machines.

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

A New Year Card _______ 　________ 　_______ her by me last week.

4. You needn't do it now.　　　

It _______ 　________ 　_________ by you now.

3. The children will sing an English song.　　　

An English song　 _______ 　________ 　_________ by the children.

2. They produce silk in Suzhou

Silk________　 ________in Suzhou.

1. We can finish the work in two days.　

The work _______ 　________ 　_________ in two days.