—What’s wrong with me, doctor?— serious. Just a slight cold.
My English is so poor, please help________ to improve it..
—Be careful ! There is _____dog lying on the ground. —Thanks a lot.
— Do you know sound travels very fast? — Yes. But light travels sound.
— When shall we leave for China? — We won’t we have visited all the places of interest here.
— I don’t think we can find a new day to work out the problem. — But we’d better not .