How much are these shoes?____________twenty dollars. A.Are B.There C.They’re
---_____ is your mother? ---She is 39.
可表示“中国共产党”的英文缩略词是_____.
-- Hi, Mike. Can you help me?-- OK. ________.
-- What can I do for you, madam?-- I'd like two ______.
This machine is very easy to use.______ can learn to use it in a very short time.