With more people __________ the traffic rules, our city is becoming better organized.
Mary is very clever and _____ worth teaching, but her brother is not.Look, he is now _____ asleep in class.
U.S.President Barack Obama arrived in China’s economic center Shanghai on Sunday night, November 15th 2009, ___ a state visit to China.
I hope you don’t mind me asking, _____ where did you buy those shoes?
How cold it is! We’ve never had ______ this winter.
Jane was asked a lot of questions ,but she didn’t answer ________ of them .