A. 颌下腺囊肿 B. 舌下腺囊肿 C. 颌下区软组织囊肿 D. 鳃裂囊肿 E. 以上都不是
A. I work hard. B. I'm dancing. C. I've got a headache. D. I like swimming.
A. 正确 B. 错误