—Doyouoftenusepapernapkins?—Seldom,　theyarecheapandeasy...

問題詳情：

— Do you often use paper napkins?— Seldom, 　they are cheap and easy to get.

                A. since           B. although          C. because                 D. if

【回答】

B

知識點：連詞

題型：選擇題