I know ice-cream is not good for me, ______ it tastes good.

“One Belt(带)，One Road”will serve to________markets for China as well as other countries along．

________ do you go to work every day —Take a bus.

Do you know if Dr White will come for dinner this eveningNo, but I think he ______ if he ______busy.

s an act or a course of action that people____ you to take by social customs, law or religion