I was drawing a horse when Kate _______ into the classroom.
A. came B. comes C. is coming D. was coming
It was a long and tiring trip, _______ most of us enjoyed it.
A. and B. but C. so D. because
My mother often tells me _______ others when they are in need of help.
A. to help B. help C. helping D. helped
—May I take this book out?
—No, you _______.
A. may not B. don't C. needn't D. mustn't
Mobile phones are popular now and they are _______ than before.
A. cheap B. cheaper
C. cheapest D. the cheapest
—_______ does it take you to get to Hainan by plane?
—Three hours.
A. How far B. How many
C. How often D. How long
