A girl is standing at the door,look at that girl这个句子有没有语法错误,需要加is吗?如果没有 我想知道那个stand为什么要加ing?

Look The girl _________ up.A.stands B.is standing A girl standing at door为什么用standing. 选择;---Who is the girl standing over there?---Who is the girl standing over there?---Well ,if you ____ know,her name is Joe.A.mustB.may Who's the girl[ ] [ ]the sun A;is standing,under B;standing,under C;standing,in D; stood,below 必须有理由 1.1.（ ）does Lucy get to harbin?A.When B.How often C.How2.Look,the girl( )ynder the tree.A.is standing B,standing C.stands who is the girl （ ）is standing at the gate?A that B who C what D which the girl with a long hair is standing under the apple tree 语法没错吧各位大哥 Look at Tom!He_on the table.A stand B standing C are standing B is standing A teacher is standing ---- the new car. god is a girl is god a girl? he is a girl The girl who is standing there is reading a new book ,whose cover is light blue.这里为什么能用whose?想不通.whose不是指“人的”吗? a girl is standing in the street with a rose in her hand.这句话with a rose in her hand不是a girl的定语吗?为什么不是这样写：a girl with a rose in her hand is standing in the street. There is a boy ( )at the door.A.stand B.standing C.stood D.is standing Mary,a ___ girl,is standing under the tree.A.six year old B.six years old C.six-year-oldD.six-years-old Think about who is always standing beside...Think about who is always standing beside a fancy car on show?Is it a boy or a girl?And this is how qualitiey are judged:if the girl looks good,there is little reason why the car beside her isn't of high between the two buildings()a monument A is standing B standing C stands D stand