Though all of us hate Chinese style road crossing,there are still ______ people crossing the road when traffic lights are red inYancheng. It must be changed.

Holiday shopping ___be a tiring experience．There are so many places to visit and choices to make．

With the development of ________, various ________ come into being. [ ]

The teacher asked us to ______ all the words on the blackboard.

(2012·南京高二检测) Some people are worrying about the possibility _______ mobile phones could be responsible for a range of illnesses, from rashes (皮疹) to brain tumors