their bed serves not only as their couch,dinner table,working desk,but as a storage 'closet' as well.在这个句子中,为什么‘closet’要加引号?

their bed serves not only as their couch,dinner table,working desk,but as a storage 'closet' as well.在这个句子中,为什么‘closet’要加引号? serves if animals can think,they will probably do their best thinking when it serves their own purposes,not when scientists ask them to.分析一下这句话 有什么特点那些 然后it 指代的是什么 __6__flowers and a bed __7__in their room. parent should not their children They are not ( ) for their some flowers and a bed are in their room 意思 they went to bed after they finished their homework.（同义句）they went to bed ___ ___ their homework. it serves you it serves you It serves you right it serves him it serves you it serves you it serves you they are sitting in___ classroom now A.they B.their C.their___ pencil is this？it's ___A.who's；jim's B.whose ；jim's C.what's；jim is___ days many families have computers.A.These B.Those C.Thismy ball is not on the bed,it's___the bed A.under B.i bed bed