( )blue umbrella ( )里是填a还是an?

( )blue umbrella ( )里是填a还是an? 是 a umbrella还是an umbrella,为什么? a white umbrella 还是 an white unbrella? umbrella,administrater前用a还是用an I have_____beautiful umbrella 括号里是加a还是an uniform 前加的是a还是an ,哪umbrella 呢 （ ）umbrella.用a或an填空 i bought(a,an)umbrella,(the,a,an)umbrella is very nice从括号里选择 make it look like an umbrella.是look,还是looks? 把This ia an umbrella.This is a William's umbrella.This ia aW I had neither a raincoat nor an umbrella,__ we have an umbrella a.(改为否定句