headache ['hedeɪk]
n.头痛
cough [kɔ:f]
n.&vi.咳嗽
have a cough
(患)咳嗽
till [til]
prep.&conj.直到
by then
到那时
trouble ['trʌbl]
n.疾病
serious ['siəriəs]
adj.严重的
catch a cold
伤风;感冒