He has to finish the experiment today. He must be in the lab, ______?
It’s a very kind offer, but I really _____ accept it.
That car nearly hit me; I ______.
“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?