用a,an填空 There is __"u" ___ "s" and ___ "e"in the word

用a,an填空 There is __"u" ___ "s" and ___ "e"in the word There is ___"u",__"s" and ___ "e" in the word "use"怎么填空 there is __"f"and ___"u"in the word "fun".用a,an填空 冠词练习用a,an,/There is __"U'',___"s"and__"e"in the word "usa"__ There is ___ a "r" and ___"u" in the word"really".用a或an填空. There is ___ "f"and __"u"in the word "four".A.an;a B,a;aC,an There is ___"r" and ___"y" in the word"really".用a或an填空. There is ___ "u",___ "s" and ___ "e" in use.(a/an) There is ___"o" and ____"u"in the word "house" A.a,a B.an,an There is __"U"and ___"E"on the blackboard There is ___"R" and—— "U"in the word understand 填an 或a ———(这 there is ()u and()m in the word music用an a填空,为什么