一How are you ?一.A. Thank youB. Sit down please.C. I’m fineD. Good morning

问题补充：

一How are you ?一.

A. Thank you

B. Sit down, please.

C. I’m fine

D. Good morning

答案：

A. Thank you

B. Sit down, please.

(答案→)C. I’m fine

D. Good morning

解析：句意: 你好吗？我很好。How are you？的回答是I’m Fine.或I’m OK.；其他的选项不符合语境；故选C。