l'm afraid that I can't attend Tom's wedding party next weekend.
A. to be held
B. being held
C. held
D. is to be held
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(答案→)A. to be held
B. being held
C. held
D. is to be held
解析：考查非谓语动词作定语。句子中已经有了谓语can't attend，故此处应填非谓语动词，首先排除D。hold与party构成被动关系，但ABC答案均表被动。因此再根据时间状语next weekend可确定填不定式表将来，故选A。考查非谓语动词作定语时，要注意看与所修饰名词之间的关系，判断是主动还是被动。同时还要注意从时间上判定，不定式作定语表将来，现在分词表进行，过去分词表完成。