Question

—Oh, you have a headache and a cough. __________ have you been like this?
— Two days.

A．How long

B．How often

C．How old

D．How many

Answer 1

A

how long用來提問“多長時(shí)間”，對“一段時(shí)間的長短”提問時(shí)用，；how often用來提問某動作或狀態(tài)發(fā)生的頻率，對“一段時(shí)間內(nèi)發(fā)生了幾次活動”（always，usually， often， never或twice a day等表示頻度的詞或短語）提問時(shí)用。根據(jù)答語Two days知，上句問的應(yīng)該是像這樣的感冒有多長時(shí)間、多久了，故選A。