— Hurry up, I think it’s going to rain. — ______ . The skies are dark and cloudy.
Test takers _______ remain in their seats until all the exam papers have been collected.
After hours of repair,the driver tried to start the car but it _______ work.
—Daddy, would you buy me an MP3 player if I do well in the first city-wide examination?—I _______, I promise.
I _______ have been more than six years old when the accident happened.
—Why does Sara know so much about Angkor Wat?—She _______ there,or she may have read about it.