1,"r"前加"a"还是"an"?2,His father left here __ a month .(A.in B.later C.after D.from

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1,"r"前加"a"还是"an"?2,His father left here __ a month .(A.in B.later C.after D.from
1,"r"前加"a"还是"an"?2,His father left here __ a month .(A.in B.later C.after D.from

1,"r"前加"a"还是"an"?2,His father left here __ a month .(A.in B.later C.after D.from
1."r"前用a 只有元音字母发音（a\e\i\o\u）开头的单词才用an
2.选C；A用于一般将来时的时间状语前
B用于时间后 e.g.a month later
Dfrom...to...

字母h前加a还是an单独的字母h 在R字母前加冠词在R这个字母前加什么冠词?用AN还是A orange前加an还是加a 1,r前加a还是an?2,His father left here __ a month .(A.in B.later C.after D.from MP4前加a还是an不定冠词 MP4前加an,a还是the exciting前加a还是an 单词 uncle前加a还是an eraser前加a还是an? black eraser前加an 还是a Asian前加an还是a American前加a还是an? 11前加a还是an information前加a还是an banana前加a还是an 字母u,r前加a还是加a最近我做了张练习卷,练习卷答案上单独一个字母u前加a,单独一个字母r前加an,还是我做错了? 英语名词加auseful前加a还是an 如何快速判断名词前加an 还是加a