Parents ______ good conditions(条件) _______ us. We should be grateful(感激的)to them.
Who is running _______ than Mike?
We want to know_______.
向别人介绍一位新朋友时,你会说:________
There is _______ “f” and _______ “u” in the word “four”.
--- _______ are you eating? --- I’m eating _______ meat.