【2013 上海】I hate travelling by air _______ you usually have to wait for hours before the plane takes off.
Today is Wednesday. He _____ be at home. He _____ be at school.
Nobody taught _____ Chinese. He learned all by ______. What a clever boy!
-What do you think of the dish? -It looks _____ and it tastes _____ too.
If you want to be healthier, you shouldn't do _____ in the classroom all the time but do more _____ on the playground.
They looked _____ each other and kept their secrets _____ themselves.