The river has become much ______ than before because of the waste water from the factories.A. dirty B. dirtier C. Dirtiest
--_______ is that quilt? --It’s black.
My name’s Mary Smith. Mary is my _______ name.
--Spell it, please. --____________.
--Your jacket is nice (漂亮). --__________.
全部是元音字母组合的是__________。