A group of environmentalists …. concerns about recent drastic environmental change including temperature increases in Northern Canada and Russia.
A.requested
B.left
C.understood
D.addressed

By the time John.... to help, we.... the work.
A.comes / finished
B.comes / will have finished
C.will come / will have
D.came / have finished

Mary sometimes.... to turn off the computer before she.... home.
A.forgot / had gone
B.has forgot / is going
C.is forgetting / has gone
D.forgets / goes

They.... good preparations before they.... their final examination yesterday.
A.made / had taken
B.had made / took
C.have made / take
D.will have made / have taken

He.... a birthday party tomorrow for his daughter who.... three.
A.is having / turns
B.will have had / will turn
C.is going to have/ has turned
D.has had / is going to turn

When Susan.... yesterday, Peter.... dinner. He.... cooking very much and often.... the meals himself.
A.phoned / was cooking / likes / prepares
B.had phoned / cooked / liked / prepared
C.was phoning / was cooking / has liked / is preparing
D.has phoned / is cooking / is liking / preparing

They.... to finish their work because they.... Los Angeles next Sunday.
A.are needing / visit
B.need / are going to visit
C.have needed / are visiting
D.needed / have visited

Ever since human beings.... the Earth, they.... use of various form of communication.
A.have inhabited / have made
B.inhabited / are making
C.had inhabited / had made
D.inhabit / make

I.... Lisa at the museum when I.... to restaurant but she.... me.
A.was seeing / was going / had not seen
B.had seen / went / was not seeing
C.have seen / have gone / does not see.
D.saw / was going / did not see

I.... that movie before last night.
A.did not see
B.has not seen
C.had not seen
D.will see