A:______pen is this?B:It's Wang fang's.A.Who's B.Whose

A:______pen is this?B:It's Wang fang's.A.Who's B.Whose ---------Have you seen ______pen?I left it here this moring.--------Is it_____black one?I think I saw it somewhere.A a,a B the,a 语法填空中this that the语法填空中比如上文提到a pen,那下文有个空______pen这个空是填this 还是that 还是the,为什么? Is this a book? Yes,this is. This is a man提问( ) is this? This is a love this is a japan This is a this is a This is a book this is a Demo This is a secret This is a story This is a This is a n_____jacket is this a jacket This is a cirde. This is a