单项选择题
A．comforts B．explains C．shouts D．apologies
A．The US government recommended the amount of food a restaurant gave to a customer. B．Health experts persuaded restaurants to serve smaller portions. C．The United States produced more grain then needed. D．The American waistline started to expand.
A．they do not have enough motivation B．they are so young that they are deprived of chances to work C．they fail to get enough education D．they are very poor in experience