单项选择题
There is one suggestion that the footsteps of crowds walking the streets in major cities could （） energy.
A.assemble B.gather C.generate D.yield
单项选择题 I believe in the （） worth of the individual and in his right to hfe, liberty, and the pursuit of happiness.
单项选择题 1 （） into the dark, sure that I would finally reach the hospital.
单项选择题 The first step is to （） your problem and go to work on it.
