It is c_____ to tip the waiter in a restaurant in some Western countriesIt is c_____________to tip the waiter in a restaurant in some Western countriescertain OR certainly？

It is c_____ to tip the waiter in a restaurant in some Western countriesIt is c_____________to tip the waiter in a restaurant in some Western countriescertain OR certainly？ It is c_____ for the students to finish homework. it is not easy to decide how much to tip waiters or taxi drivers译成汉语 It is very rude not to give others a tip in the US. It is a little difficult to c_____ someone when he or she is excited. Victor will come to China.It is a good c_____ to see him. I don't want to go to the supermarket.It is very c_____ there Look at the c_____ in the sky.It is going to rain It is raining hard,but the workers c_____ to build the road Many friends come to c_____ it. Life under the sea is c_____.It is beatiful There are so many people in the street.It is not easy to find her in the c_____ How about Tony?He wants to c_____ the Table Tennis Club because it is his favourite sport. It is not easy to decide how ___ to tip waiters or taxi drivers.A.often B.many C.soon D.much This is a c_____ game.I like it. What c_____ is the milk?It's w_____. When a bird flew to the plane,it lost c_____ A bank clerk's job is to c_____ money?