这件礼物是谁送的?是他送的._who__is this present_from__?It's_from_ him__.你的手表在我的前面,但是她的在哪了?Your_watch__is_in_ _front_ _of_ me,but where's_hers__?这写CD是谁的?是我们的._whose__CDs_are__ ...That sign means"Keep off the grass"(改为同义句）It means"Danger".(改为一般疑问句）怎么写That sign means"Keep off the grass"(改为同义句）That sign means stay away from the grass It means"Danger".(改为一般疑问句）Does it mean "Danger"?