—Where have you been, David? You're late for class again.—________ My bus got caught in a traffic jam.
“I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”
“I thought you wouldn’t mind.” “Well, as a matter of fact I don’t, but you _____ me first.”
—The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job? —____ my students have a try?
If Sanlu Group __________melamine to the milk, the babies ________ too much from kidney stones.
— Are you going to Lloyd’s birthday party on Friday? — Only if it ______, he said he was having a picnic party.