The workers in the factory demanded that their pay   by 20 percent.

Although this ____ sound like a simple task, great care is needed.

 It is so cold here in Zhengzhou this winter that it seems as if we ______ in Iceland.

John agreed to the suggestion that his students _____ two weeks to prepare for the exam. 

Without the timely aid from different provinces, the affected people in those areas ________ the difficulty.