— I ____ to your birthday party last Sunday.— Unfortunately, you were out on business.

I didn’t know that he was a cheat, or else I ________________ him.

The flight was put off due to the typhoon. Otherwise, we______ the beautiful scenery in Greece now.

—Is there a fog in the evening ?—There________be . I’ll make a phone call to find it out .

Smoking pollutes air. You ______ smoke here.