The waste can be recycled into new products, which _________ will save natural resources.

We have heard of many cases _______  some citizens ，especially some famous people， have suffered because personal information had been leaked.

—Where did ________traffic accident happen,sir?—It took place at ________crossroads by the bank.

.Every year in April, the Water Festival ______ among the Dai people in Xishuangbanna.

 Richard was called in by the police to answer questions _______ the disappearance of Thomas Ripley, whose relatives were so ______ his present situation.