问题补充：
Not only I but also Tom and Jack interested in English because it useful.
A. is, is
B. is, are
C. are, is
D. are, are
答案：
A. is, is
B. is, are
(答案→)C. are, is
D. are, are
解析：句意：不仅我而且汤姆 和杰克也对英语感兴趣，因为它事实有用的。Not only … but also…,不仅……而且……，该结构有就近原则，it，第三人称单数，故选C
