Everyone likes the books that----good for their studies.A.is

B.定语从句的谓语动词和先行词一致,此句先行词是books复数,从句中,用are
be是is are的动词原型,不可直接充当谓语动词,do good 后面得用to,此句中be good for 对什么有好处,有益处