Great efforts___________grain production must be made if food shortages are to be avoided.
| A．to have increased | B．increased |
| C．to increase | D．to be increased |
The unsold good she brough to me are useless to me,____?
| A．aren’t they | B．are they | C．did he | D．didn’t he |
Let me introduce myself to you all,____?
| A．may you | B．will you | C．won’t I | D．won’t you |
This is an illness that can result into talblindness____left untreated.
| A．after | B．if | C．since | D．unless |
.In the open boat,the four men,____was a doctor,met with a storm a tsea.
| A．one of which | B．one of who | C．one of whom | D．one of them |
____rich and strong!
| A．Our country may become | B．May our country become |
| C．Our country becomes | D．Does our country become |