The effect __ the drug isnt as great as the advertisement says.A.of B.on 该选哪个呢?

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The effect __ the drug isnt as great as the advertisement says.A.of B.on 该选哪个呢?
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The effect __ the drug isnt as great as the advertisement says.A.of B.on 该选哪个呢?
The effect __ the drug isnt as great as the advertisement says.A.of B.on 该选哪个呢?

The effect __ the drug isnt as great as the advertisement says.A.of B.on 该选哪个呢?
答案:A.
翻译:这个药的功效并不如广告上所说的那样好.
根据句意,明显为名词所有格形式.
the effect of the drug = the drug's effect 这个药的功效
如果用on,则句意为“某物对这个药物的功效”,句意不通.

B啊

B

选A.

effect +of,例如the harmful effects of smoking吸烟的坏处。
the effect of the drug 这种药的效果 ,所以选A

a
药的疗效 of=的
on的话后面应该加一种病,表示这重要在某病的疗效上,on=在