根据句意和提示写出单词,完成句子。每空一词。 小题1:We should brush our ________________ (牙齿) after each meal. 小题2:On his mother’s ________________ (四十) birthday, he gave her a card and some flowers. 小题3:Does your father like _________________ (看) newspapers? 小题4:You may _________________ (借) the book for two weeks. 小题5:Now mankind is exploring those ___________________ (未知的)outer space in many ways.