题目内容
5. Many AIDS patients think it to have AIDS,so they usually keep it a secret from others.
A. doubtful B. harmful C. shameful D. painful
5. C从题目后半句"they usually keep it a secret from others"可以看出,艾滋病患者通常将自己的病情保密,是羞于让别人知道,因此选项shameful (可耻的,丢脸的) 为正确答案。
doubtful意为"可疑的,不确定的,疑心的"; harmful意为"有害的,伤害的";painful意为"疼痛的,使痛苦的"。这三个选项都不合题

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