We should remember to save water resource and not to leave the water_____all the time.

Please make my excuse at tomorrow’s meeting--- I’ve got too much work _____. 

North Korea fired a long-range rocket last month, but the launch was reported ______ in failure.

 Anyone ______ trying to take knives on board flights would be caught by the police. 

 The performance of the host, _____ to please the audience and draw their attention, was greeted with a cold silence, however.