With so much water being used in the bathroom,it is no  _____ that more   environmentally friendly technologies have come out to make better use of water resources.

—When are you leaving for Guangdong?—My plane ________ at six.

 The mountain village is my hometown.   I spent   _____   merry night there when I was young.

Those young men were ________ by the police with making trouble in the neighbourhood.

(2013·太原五中模拟)The traffic problems we are looking forward to seeing ________ should have attracted the government's attention.