My home is near the school. So I can walk to school ______ by bus.
----______has Tom been a doctor ? -----Since two years ago.
Mr Hu has travelled to six countries _______.
Though he is _____ at home ,but he doesn’t feel ______
---I feel _____ hungry now. ---- Why not go for dinner with us .
-----How ____you are coughing! -----Yes, I have had a ________cough since last week.