Given that (鉴于) you feel so stressed , you _____ as well take a weekend break to relax yourself. 

---      your brother swim, John?---No, he       .

Just imagine performing such an opera as Turandot in the Forbidden City---there _____ be a better setting! 

— My sons are not a little restless．— Oh? Boys _______ be boys．

-Mr. Zhou, _____ the Iphone belong to Alice?-I’m afraid not. It may be John’s, but I’m not sure.