Look, so many people are running out of the station. I wonder what ______ .
Mrs. Green is ________ grandmother.
The little girl _______ the dolls ________ that.
There is _____ “s” and _____ “u” in ______ word “use”.
单词辨音
--- It shouldn’t take long to clear up after the get-together if we all volunteer to help . ----- I quite agree with you . _____________.