是in Aprli,还是on April?

是in Aprli,还是on April? 是in the afternoon of April 30th 还是 on the afternoon of April 30th 是On the morning of April还是In the morning of April?这里没有精确到天 April 4 1969前面接on还是in 14th April 2010 前面用什么 on 还是in on the evening of April 3rd还是in the evening of April 3rd 我的生日是4月13号,是“my birthday is on April 13th”还是“in April ” 他的生日在五月的第一个星期天 是用on 还是in? on/in/at April 12 在具体某一天的早上用什么介词啊,是in还是on?（是写in还是on）the morning of April 18th. 英语“月份,年份”,前面是用in还是on比如说I was born ( )April,2001.括号里应该填什么? 是my birthday is april 4th 还是 my birthday is in april 4th? IN/ON everning of April 4th 就是OF结构的具体某天上午下午是用IN还是用ON? He got to Guangzhou___the morning on April 16th.用in还是on WE USUALLY HAVE OUR SCHOOL TRIP ( ) A MORNING OF APRIL.选IN 还是 ON on -------Monday afternoon in April 中间应该填什么?the还是a 我要权威! It is in April 5.It is on April 5.IIt is in April 5.It is on April 5.It is at April 5.哪个正确? ------When is your party?-------It's____ A.in April B.on April C.at April D.of April 英译汉 USA on the 31st of March and arriving in Wuhan,China on the 2nd of April.I will be leaving the Atlanta Georgia,USA on the 31st of March and arriving in Wuhan,China on the 2nd of April.究竟是3月31日到达武汉，还是4月2日到达武