He directed exposure to pigs,otherwise he_______pig flu.

While watching television, __________.

Eliza remembers everything exactly as if it _________ yesterday. 

——Do you think it necessary that he ________ to Miami but to New York? ——I agree， but the problem is ________ he has refused to. 

I told your friend how to get to the hotel， but I perhaps I __________ have driven her there.  

——My cat’s really fat. ——You____________have given her so much food. 

Thank you for all your hard work last week. I don’t think we ____ it without you.

_______ he had not hurt his leg, John would have won the race.

If it were not for the fact that she_______sing, I would invite her to the party. 

__________ fired, your health care and other benefits will not be immediately cut off.

—How’s your tour around the North Lake? Is it beautiful?—It ________ be, but it is now heavily polluted.

John promised his doctor he _____ not smoke and he has never smoked ever since.

According to the air traffic rules, you ___ switch off your mobile phone before boarding.

When I was young, I was told that I ______ play with matches

-What sort of house do you want to have? Something big?--Well, it ______ be big--that's not important. 

—I can’t find my purse anywhere.—You __ have lost it while shopping.

Although this ____ sound like a simple task, great care is needed.

Liza ___ well not want to go on the trip --- she hates traveling.

—She looks very happy. She ______ have passed the exam.—I guess so. It’s not difficult after all. 

Thank you for all your hard work last week. I don’t think we ______ it without you.