Unless it did not rain, Ngoc would pay US a visit as soon as possible.

                    A                       B                C                 D

You should run into Mark, tell him he owes me a call.

If the weather weren’t nice, we would go on a picnic.

if she bought that car now, she ran out of money.

Unless I won a huge prize in lottery, I wouldn’t give off my job.

Out into the street the thieves ran.

What a pity! Had I been there on time, I would not miss the performance last night.

If I had known that the road were blocked, I would never have taken that way.

No longer does my teacher teaches in this school.

If Lucy had finished her task, she can go home.

If the doctors could successfully develop to the vaccine, a lot of people would be saved.

Water would run downhill if there were not gravity.

If you send the application form to our school, you would have been offered a scholarship.

            A               B                C                                                 D

If Mary had been here now, she would discover the truth about your lies.

If I known you were in trouble yesterday, I would have_tielped you.

When my parents were out working in the field, however, I helped with milking the cows, feeding the calves and the pigs.

                                       A                                         B                                C                              D