2009年12月大學(xué)英語四級考試模擬試題(六)

　　body. He got patients to watch funny films, and monitored their blood pressure, heart rate and

　　muscle tone. He found that laughter has a similar effect to physical exercise. (44) _________

　　_________________________________________________________________________. It also

　　makes our facial and stomach muscles work. Fry thinks laughter is a type of jogging on the spot.

　　Laughter can even provide a kind of pain relief. Fry had proved that laughter produces

　　endorphinschemicals

　　in the body that relieve pain. Researchers divided forty university students

　　into four groups. The first group listened to a funny cassette for twenty minutes. The other three

　　groups (45) _____________________________________________________________________

　　______________________________________________________. Researchers found that if they

　　produce pain in the students, (46) ___________________________________________________

　　________________________________________________. Some doctors are convinced that

　　humor should be a part of every medical consultation, as there is evidence to suggest that laughter

　　stimulates the immune system.