We must water the flowers every day. （變?yōu)楸粍?dòng)語態(tài)）

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

My brother often mends his watch. （變?yōu)楸粍?dòng)語態(tài)）

  His watch ____ ____ ____ by my brother.

We'll put on an English play in our school. （變?yōu)楸粍?dòng)語態(tài)）

  An English play ____ ____ _____ on in our school.

Did they build a bridge here a year ago? （變?yōu)楸粍?dòng)語態(tài)）

____ a bridge ____ here by them a year ago?

He made me do that for him. （變?yōu)楸粍?dòng)語態(tài)）

I ____ ____ ____  ____ that for him.

People use metal for making machines. （變?yōu)楸粍?dòng)語態(tài)）

Metal ____  ____ for making machines.

You needn't do it now. （變?yōu)楸粍?dòng)語態(tài)）

It ____  _____  _____ by you now.

The children will sing an English song. （變?yōu)楸粍?dòng)語態(tài)）            

  An English song ____  ____  ___ by the children.

They produce silk in Suzhou. （變?yōu)楸粍?dòng)語態(tài)）  

Silk ____  ______ in Suzhou.

We can finish the work in two days.     （變?yōu)楸粍?dòng)語態(tài)）             

  The work _____ _____ _____ in two days.