11. I was reading a book when Mary ____________ in.
A. came B. comes C. coming D. come
12. We ............... TV at 8 o’clock last night.
A. are watching B. were watching C. watched D. watch
13. There are three competitions: water-fetching, ____________ and rice cooking.
A. making-fire B. fired-making C. fire-making D. fired-make
14. It’s Lan’s daily mistake. She is always____________ to school late.
A. come B. coming C. comes D. came
15. I don’t know how ____ the game.
A. playing B. to play C. played D. can I play
16. Millions of Christmas cards___ every year.
A. were sent B. send C. is sending D. are sent