—Why not open the windows to let_____cool air in? —I'd rather you didn't_____air in our town is terribly polluted. A.a;The B/;The C./;/ D.the:/
— Why didn’t you give a hand to the boy? — I _______, but he strggled to his feet before I tried to.
—You didn’t invite Mary to the ball? —____ her, too?
—She joined a football team last fall and was recently made captain. —Never _____ she'd ever have that much energy.
I ____ you, but I didn’t think you would listen to me.
—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?