Unless (A) we leave a bowl of (B) water under (C) the sun, it will (D) evaporate.
A.a bowl of (B)
B.under (C)
C.Unless (A)
D.will (D)

If (A) we continue to use (B) fuels at the current rate, we would (C) soon have to face (D) a fuel crisis.
A.to use (B)
B.to face (D)
C.If (A)
D.would (C)

How nice (A) it would be for (B) our parents if (C) we could have built (D) the house for them.
A.How nice (A)
B.be for (B)
C.could have built (D)
D.if (C)

If Columbus _______ money from Queen Isabella, he _______ across the Atlantic.
A.did not receive/ might not have sailed
B.would not receive/ might not sail
C.had not received/ might not have sailed
D.do not receive/ could not sail

“I couldn’t have made it without your help” means
A.I couldn’t have made it if you helped me.
B.I couldn’t have made it if you hadn’t helped me.
C.I couldn’t have made it if you had helped me.
D.I couldn’t have made it if you didn’t help me.

Without your help, I couldn’t overcome the problem.
A.If you don’t help me, I can’t overcome the problem.
B.If you hadn’t helped me, I couldn’t have overcome the problem.
C.If you didn’t help me, I couldn’t overcome the problem.
D.If you hadn’t helped me, I couldn’t overcome the problem.

Thanks to Laura’s report, I was able to finish the project.
A.
B.Had it not been for Laura’s report, I wouldn’t have been to finish the project.
C.If there isn’t Laura’s report, I wouldn’t finish the project.
D.I wouldn’t have finished the project if Laura didn’t help me.

It may rain this afternoon. I hope it doesn’t because I don’t want the match to be cancelled.
A.If it rained, the match would be cancelled.
B.If it rains, the match will be cancelled.
C.If it rains, the match is cancelled.
D.If it had rained, the match would have been cancelled.

Will you be angry if I _____ your pocket dictionary?
A.steal
B.have stolen
C.were to steal
D.stole

You made a mistake by telling her a lie. It _____ better if you _____ to her.
A.will be/ don't lie
B.would be/ didn't lie
C.would be/ hadn't lied
D.would have been/ hadn't lied