—Are you planning to take American History by Mr Johnson next semester?—________ I might not have enough time.
How ______ you say that you really understand the whole story if you have covered only part of the article?
–Smoking is bad for your health. --Yes, I know. But I can’t _____.
Many new buildings are being ________ in this area now.
You shouldn’t accept a gift from a person _____ you don’t know him.
I first met Lisa three years ago. She _______at a clothes shop at the time.