in formal occasion还是on formal occasion?
问题描述：
in formal occasion还是on formal occasion?
答
on great occasions
在大庆[盛典]时期
用On
答
on formal occasions 或者 on a formal occasion
答
与occasion搭配的相关词组:
by occasion of由于,因为;
on occasion(s)偶尔,间或,有时;
on the occasion of在…之际;
所以要用on