In summer milk will quickly go bad_____ it is put into a fridge.
—Wish you good luck in this English exam.—_______
—Is that girl in red ,Sally?—No, it_______ be her. She has gone to Hong Kong.
It’s winter now. We should stay away from cold _______doing sports every day.
—You look very happy, why?—I have got _______ “A” in the math test.
--You look very cool today , Simon .---___________________