on April 4,1968 请问这里的4,应该怎样用英语拼读?

on April 4,1968 请问这里的4,应该怎样用英语拼读? 是On the morning of April还是In the morning of April?这里没有精确到天 on the morning of the 16th of April 这里为什么不用介词in April 4 1969前面接on还是in （）is your birthday?on april 4th The Hubble telescope was launched into space by NASA on April 20,1990 at a cost of over a billion dollars.请问,at a cost of over a billion dollars.在这里充当什么成分? World Book Day falls on April 23 every year .这里面的falls on 当什么讲为什么这么用? on April first 和 on April the first 那个对 on/in/at April 12 We have ______ ______ ______ on April fifth.艺术节 这里是填 an art festival 还是art festival is？ We have ______ ______ ______ on April fifth.艺术节 这里是填 an art festival 还是art festival is? April Fool's Day is on April 1st 对on April 1st 提问 英语：请问我出生在1988年4月11日怎么读啊?口语读法：i was born on april the eleventh nineteen eighty-eighth和：i was born the eleventh of april nineteen eighty-eighth请问这两种口语读法是否都正确?最后修改下,是 ------When is your party?-------It's____ A.in April B.on April C.at April D.of April 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? april april april