It is ________ the customers' needs that has made chain stores so popular in big cities in China.
We must keep our room clean. Dirt and disease go , you know.
-Could I use your bike, Jack?--Of course, you____________.
Helen is much more kind to her youngest child than to the others,___________ of course, make the others unhappy.
--____________?--He is tall and strong.
She suggested to the police in the police station that__________.