用such和so填空。 1.I know ______ a clever boy. = I know ______ clever a boy. 2. They are ______ useful books. 3. He gave us _______ good food. 4. There are _______ many flowers in our school garden. 5. You' ll find English a bridge to _______ much knowledge. 6.I have never seen ______ a tall man. =I have never seen ______ tall a man.