30．A recent study finds that the cost of treating cancer has doubled over the past 20 years, but those costs are　　　　 overall trends in health spending.

　　　　 A．in line with　　　　　　　　　　　　　　　　　　　　　　　　　　　　 B．in association with

　　　　 C．in comparison with　　　　　　　　　　　　　　　　　　　　 D．in harmony with

29．Most people interviewed said: “We’ve been warned all about the bad effects of sunbathing, yet we keep putting ourselves　　　　 .”

　　　　 A．at play　　　　　　　　　　　 B．at peace　　　　　　　　　 C．at risk　　　　　　　　　　　 D．at work

28．Unbelievable as it is, the film 2012 without doubt　　　　 a warning that human beings are faced with potential dangers.

　　　　 A．serves as　　　　　　　　 B．belongs to　　　　　　　 C．consists of　　　　　　　 D．stands for

27．His mother died of a serious disease when he was a child, for which reason his father 　　　

him for a doctor.

　　　　 A．determined　　　　　　 B．intended　　　　　　　　　 C．ensured　　　　　　　　　 D．guided

26．In order to finish the task in advance she works day and night and doesn’t　　　 the cost to her health.

　　　　 A．guarantee　　　　　　　 B．decrease　　　　　　　　 C．ensured　　　　　　　　　 D．guided