根据汉语意思完成英语句子 1. “书包在哪儿?” “在桌子下面。” —_________ the schoolbag? —It's ________ the table. 2. “地图在哪儿?” “我认为在你爷爷奶奶的房间。” — ________ the map? —I think it's _____ your ________________room. 3. “你的书在哪儿?” “它们在椅子上。” —________ _______ your books? —They are ______ the chair. 4. 钥匙在书架上。 The keys _______ _______ the bookcase.