-DoyouknowLucywell?   -OfcourseIdo.We'vebeengoodfriends...

問題詳情：

- Do you know Lucy well?

    - Of course I do. We've been good friends_______ ten years ago.

    A. for                 B. since              C. after              D. until

【回答】

B

知識點：介詞和介詞短語

題型：選擇題