The village is building a school．I hope it ________ before August this year．

A．finishes

B．will finish

C．is finished

D．will be finished

－I want to be a doctor．－Doctors ________ greatly in every part of the world, I think．

A．need

B．are needed

C．are needing

D．will need

－Where did you go last night?－I ________ to go to Li Lei's birthday party．

A．asked

B．am asked

C．have been asked

D．was asked

This kind of food ________ cool, clean and dry according to the instruction．

A．should be carried

B．must be put

C．should be placed

D．must be kept

The window ________ ten minutes ago, and the room is bright now．

A．can be cleaned

B．is cleaned

C．was cleaned

D．will be cleaned

－Do you know who designed the CD-ROM Around the world in Eight Hours?

－Yes．It ________ by Nancy Jackson．

A．has designed

B．designed

C．was designed

D．designs

Personal computers ________ in 1976．It has changed the whole world．

A．have been invented

B．are invented

C．were invented

D．invented

Some people think trees ________ on Tree Planting Day only．

A．should be planted

B．should plant

C．should be planting

D．be planted

－How beautiful our hometown is!－Yes, trees and flowers ________ everywhere．

A．can be seen

B．can see

C．be seen

D．can't see

It is said that potato chips ________ by mistake a hundred years ago．

A．invent

B．invented

C．are invented

D．were invented