There's ( )"x" in the work "box" A、a B、an C、the D、one

There's ( )"x" in the work "box" A、a B、an C、the D、one There is( "h" in the word "hour".A.a B.an C./ D.one there is___"s"in the word"sun".a.a b.an c.the d./ There is a X in the word “box” A a B in C the 改错 为什么 There is a "X" in the word “box” A a B in C the 改错 为什么 There is _____ “m” in the word “map”. A. an B. the C. x D. a There is ( ) in the word "must" .A.a“M” B.an“M” C.a“s” D.an“ What't in the box?( ) A Nothing B None C No one D No. Look,there something in the box.A.are B.is C.am D.will be There's 'u' and 'r' in the word 'umbrella'.A:a;an B:an;an C: there is___park in the centre of the city A：a b：an c：the d：/ There is -------"a" in the word "arm".A.a B.an C .the D./