—Why are you still here? It’s already seven o’clock.—Because I ________my work. Don’t worry. It’s almost done.
While she_____ on the phone, a man walked into her room.
— Where is the post office? — It’s _____ the hospital.
— You went to town last month, What do you think of it? — Terrible . I _____ go there _____.
If there are ____trees, the air in our city will be ____cleaner.
Before the police , the alien left the shop .