填is,这是个完全倒装句,正常的语序是a picture of the author taken when he was young is on front cover of the books(我觉得加个of比较合理),这本书的扉页上有一张照片是现在的事,所以用一般现在时,不要受到when he was young的误导,这只是说明这张照片拍摄的时间而已.
is吧,这句话是陈述一个事实,用一般现在时。又是一个倒装句,主语是 a picture of the author taken when he was young,其实中心词就是a picture,谓语就是is,宾语就是On front cover the books,连起来就是A picture of the author taken when he was young is on front cover the books
个人认为选择is 句意:此句为倒装句。介词短语前置。 正常语序为 A picture of the author taken when he was young is on front cover (of)the books 这个句子感觉有点问题on the front cover the books应该是题目出错了 陈述一个事实,这本书的封面是作者年轻时的...