Only when I filled my glass did I notice that it was broke.

          A                            B                        C               D

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

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

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

Out into the street the thieves ran.

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

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

No longer does my teacher teaches in this school.

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

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

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

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

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

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

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