My friend Mary is () beautiful girl and () girl everyone likes to work with.A.a,a B.a,the C.the,a D.the,the答案选a,能解释得具体点吗?

Mary is my friend.对Mary提问 my friend Mary 同义句My pen friend is a girl (called) Mary Mary,in,is,china,my,friend连词成句. Mary is my friend.She is the best friend of me.哪一出出错? 用英语表达“我的朋友被叫做Mary”的时候,是如何表达My friend is called Mary...还是 My friend was called Mary... Tom,()my friend,mary.A this‘s B this is C she is D her is Mary is my best friend.she is intersted in space very much. Mary is my friend.( ) is thirteen years old.空着的用适当代词填上 Mary is my good friend.I often telephone her.（合并成一句）改成I often keep ----- ------ with my good friend Mary------ -----. Mary,___ is my friend,Emma.A.it B.that C.this D.she Mary is my good friend.I often telephone her 合并一句 已给 Mary,()is my friend,Emma A.it B.that C.this D.your Mary,this is my friend,Emma.这句话是否正确,如果错误就改正 Mary is a good friend of ___.A I B me C.my D.mine mary is my( )(sister)friend.给所给词的适当形式填空 My friend Mike is between Mary and ____(I)填I还是me dad,t____is mary.she's my friend