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问题: 模拟卷5-29

The doctor advised me to take this kind of medicine because it has ______ getting down my high blood pressure.
A.an effect on
B.some effect on
C.the effect for
D.the effect of
请详细写出解题的过程和思路。

解答:

effect作为名词后面常跟on、upon和of
have effects on/upon 对……有影响,后面跟的是被影响的人或事物
effect of ……的影响,后面跟的是施加影响的人或事物
因此排除C和D
B语法错误
所以答案是A