unit four is she in the living room? 他在客厅里吗? is she in the living room? no she isn't。 不,他不在。 no she isn't where are the keys? 钥匙在哪儿? where are the keys? are they on the table? 他们在桌子上吗? are they on the table? no they aren't they are in the door? 不,不在。他们在门上。 no they aren't they are in the door。