【題目】—Look at the flowers I gave you last month. They are dying! _______ do you water them?

—Sorry, I forgot to water them.

A. How long B. How often C. How soon

【答案】B

【解析】句意：看我上個月給你的這些花。他們快要死了！你多久給它們澆一次水？——對不起，我忘了給他們澆水了。A. How long多長時間；B. How often多久一次；C. How soon多久。How soon用于將來時態(tài)，排除C；根據(jù)答語判斷，問句是詢問多久澆水一次，答案為B。

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