春兴
（唐）武元衡
杨柳阴阴细雨晴，残花落尽见流莺。
春风一夜吹乡梦，又逐春风到洛城。
阅读下面的连环画，完成下题。
It's very convenient ______ us to buy train tickets now because we can buy them either from the station or on the Internet.
