2011年高考英语一轮复习学案:unit19-20(高一部分)
1.radioactive matter is dangerous to work with because it has a bad effect________ the blood.
a.to b.fo c.in d.on
解析:have effect on是习语,意为“对……有影响”。
答案:d
2.you are not in good health, i think.you could improve your ________ by running every day.
a.position b.situation c.condition d.energy
解析:condition可指“身体健康状况”。
答案:c
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