Thanks for _____ us so _____, Mr. Smith.
-----How ____you are coughing! -----Yes, I have had a ________cough since last week.
----Why are you so tired these days? ----- Well, I have _____homework to do.
----How was your trip to Beijing? ----We really enjoyed ________.
____the end of the day, we were very tired.
Linda _____ many places of interest in China, and she still wants to go to more places.