问题补充：
Jim is very popular in our class because he is clever helpful.
A. not only; but also
B. either; or
C. neither; nor
D. too; to
答案：
(答案→)A. not only; but also
B. either; or
C. neither; nor
D. too; to
解析：词义辨析。not only; but also不但……而且；either; or或者……或者；neither; nor既不……也不；too; to太…..而不能。句意：Jim在我们班很受欢迎，因为他不但聪明，而且乐于助人。所以选A。
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