My father was watching TV ______ my mother was cooking.
—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 . ---___________________