Mary always ___ some difficult questions to me.
I hate traveling by air ______ you usually have to wait for hours before the plane takes off.
Hurry up, or you ______ catch the train.
You can improve your English ______ practicing more.
—What’s wrong with you, Eric? You look tired.—I ______ to prepare for the final exam last night.
Tony is not as clever as Lucy, but he works ______ than her.