I have a ______ friend. He has lived in the _____ island for half a year to do some research.
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 . _____________.
The boy is ________ to greet us every morning .
--How long has Robert _______? ---Since 2000.