单项选择题
A. Too expensive. B. Hard to drive. C. Easy to control. D. More than just a charge.
A. The changes of soccer. B. The rules of rugby. C. Different village players. D. The birth of American football.
A. when one man feels happy, another man will feel sad B. what will make one man happy may make another man happy also C. different people hold different opinions about happiness D. both A and B