---I feel really tired.---___________________A. Lucky you! C. You’d better work harder.C. Congratulation! D. Why not go and have a rest?
—The green bag reminded the old man _____ the days when he was young.
—We find ______ impossible for us to learn a foreign language well in a short time.
—You should spend as much time as you can_____the piano.
—Do you know ______ I could pass the exam? —Sorry, I‘ve no idea.
—Who’s the most modest boy in your class? —Daniel.He never___ in public.