They were exposed to biased information, so they didn’t know the true story.
A.If they got unbiased information, they could know the true story.
B.If they had unbiased information, they could have known the true story.
C.If they had been exposed to unbiased information, they would have known the true story.
D.If they have exposed to the unbiased information, they would have seen the true story.

.... you apologize for what you have done, I will never be your friend.
A.Unless
B.If
C.As if
D.Even if

He may never speak to me again if he.... out what happened.
A.will find
B.was finding
C.finds
D.had found

The salesgirl told the boy that if he did not leave she.... the police immediately.
A.will call
B.called
C.would call
D.would have called

Submit the report to the boss.... it.
A.unless you would finish
B.provided that you would finished
C.if you have finished
D.if only you finished

If I were you, I ______ that coat. It’s much too expensive.
A.won’t buy
B.don’t buy
C.wouldn’t buy
D.didn’t buy

My grandfather .... a very exciting life. When he was young, he.... on the farm in the country, where there.... a lot of cattle and meadows.
A.has / has lived / have been
B.had / lived / were
C.was having / had lived / had been
D.has had / is living / are

Mary.... on the essay for two hours now and she.... that she.... it in one more hour.
A.is working / has hoped / can finish
B.has been working / hopes / will finish
C.will have worked / hopes / finishes
D.had been working / hoped / would finish

Choose the best answer to complete the following sentences.
If she.... me, tell her to leave a message.
A.calls
B.will call
C.called
D.would call

John will pick me up.... .
A.in case it rained
B.if it rains
C.provided that it would rain
D.unless it rained