Question

-- Do you know _    her mobile phone?
一 No, I think it cost her around 4000 yuan.

A．when your sister paid for

B．how much your sister will pay for

C．how much your sister paid for

D．when did your sister buy

Answer 1

C

試題分析：句意:-你知道你的姐姐買手機花了多少錢嗎？-不，我想大約會花費她4，000元。根據句意和下面的回答可知，這里是問他的姐姐買手機花費了多少錢，故可排除A和D；并且他的姐姐已經買了手機，所以這里應該用過去時態。故選C。