He was unable to give a credible explanation for his behavior.A:workable B:convi

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问题 He was unable to give a credible explanation for his behavior.

选项 A:workable
B:convincing
C:practical
D:reliable

答案D

解析本句意思:他不能为自己的行为给出一个可信的解释。workable的意思为“可行的,行得 通的”;convincing的意思为“有说服力的,有力的”;practical的意思为“实际的,可行的”;reliable 的意思为“可靠的,可信赖的”。credible的意思为“可信的,可靠的”,和reliable的意思接近。
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