In order to make our city green, ________．

1. A.
   it is necessary to have planted more trees
2. B.
   many more trees need to plant
3. C.
   our city needs more trees
4. D.
   we must plant more trees

In order to make our city green，______.

A．it is necessary to have planted more trees

B．many more trees need to plant

C．our city needs more trees

D．we must plant more trees

In order to make our city green，______.

 In order to make our city green，______.

In order to make our city green，________.

A．it is necessary to have planted more trees

B．our city needs more trees

C．many more trees need to plant

D．we must plant more trees