The traffic problems have severely affected economic development. ________, we must spare no efforts to solve them.

Work gets done ________ when people do it together, and the rewards are higher too. 

It was ________ impossible for her to catch the 9 o’clock train. I know she got up at 9:15．

Luckily, only a few passengers aboard were ________ injured in the traffic accident.

The death toll of the quake in New Zealand is _____ 150, but officials say the figure won’t stand because they are still getting information in.