单项选择题
（）in the open air has given you a good color.
A.Work B.Worked C.Working D.To be working
单项选择题 The river （） to the east. It is the second longest river in the country.
单项选择题 "The ceremony has already started." "Look! The flag（）now."
单项选择题 I feel it's an honor（）to attend the opening ceremony of the new bank.
