The doctor said this medicine is ______ against lung cancer.

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问题 The doctor said this medicine is ______ against lung cancer.

选项 A、efficient
B、effective
C、expensive
D、effort

答案B

解析 医生说,这种药对于治疗肺癌是很有效的。本题考查形容词词意辨析。A.有效率的B.有效的C.昂贵的D.努力。因为此空需填形容词,所以首先排除D选项,再根据句意故选B。
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