there is an "h" in the word "house".为什么用"an"修饰"h"

there is an "h" in the word "house".为什么用"an"修饰"h" 为什么不是There is a (h) and an (u) in the word (hour). There is an "h" in the word "hour",but the "h" is silent.中的" There is( )"h"and( )"u"in the word "house" There is ______ "h" in the word "hour". A.a B.the C.an D.\ There is ( )''h'' in the word ''hour''.A:a B：the C:an 请说明理由, there is ——“h” in the word "hour" A a B an C the D / There is( "h" in the word "hour".A.a B.an C./ D.one There is ( )“u” and ( ) “h” in the word “hour”. A.a a B.an a There is an "s" in the word "bus".为什么用an 用a、an、some、any填空：Tere is ()"h" in the word "hen" There is a“u”and an “n”in the word“run”．问什么用a来修饰‘u’用an修饰‘n’啊