致喉阻塞的原因有()
A.急性会厌炎
B.咽后壁脓肿
C.喉癌
D.一侧声带瘫痪
E.喉外伤
参考答案:A, B, C, E
Ramon burned the roast. He didn’t want to tell Betty about______, so he bought______. [ ]
A. them; more one
B. it; the other
C. one; the others
D. it; another one
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