单项选择题A．Performance at work matters more than anything else.B．There are laws protecting employees’ working rights.C．Good reasons must be provided in order to fire workers.D．Working contracts in the US are mostly short-term ones.

填空题If no one is — 改成While／Whereas

填空题costly／expensive

填空题half∧of the — 加入that

填空题despite of — 删去of