There is( )"u"and （）"n"in the word "unit"怎么填?请告诉我怎么填和为什么好么?我不喜欢自己有不懂.

There is ()uand()sin the word useful. There is ( )uand ( )s in the word us there is ( )u and( )n in the word aunt There is ( ) u and ( ) r in the box.为什么? There is a U and anS in () use. There is ( )“u”and（ ）“l”in the word “ruler”请说明原因 那不是i是l There is{ } u in the word found and{ }letter is in the middle of this word 为什么不是There is a (h) and an (u) in the word (hour).而是There's an (h) and a (u) in the word (hour).Thank you~ There is( )hand( )uin the word house为什么“h”前用“an”,“u”前用“a”? There is a (h) and an (u) in the word (hour).这句英文对吗 There is ____ ''b'',____ ''u'' and ____ ''S'' in the word ''bus'' . There is au and a s in the wordbus'哪错 题就这样 There is( ) uletter and ( ) rletter in the word ruier there is [ ] ‘u’ and [ ]‘s’ in the word bus.填什么 There is () "u" and "h" in the word "hour" There is __u and __ m in the word umbrella. there is __fand ___uin the word fun.用a,an填空 there is ()u and()m in the word music用an a填空,为什么