-IjoinedtheLeague

來源：國語幫 2.61W

-I joined the League _____ May 4th, 20ll. What about you

-I have been a League member ______ three years ago.

A. in; for B. on; for . C. in; since D. on; since

【解析】此題重點考查介詞的基本用法。確指某一天的時候要用介詞on。Since表示自從…後跟點時間，常用在完成時中。