Online paper-checking requires that more attention .A. be paid to spellingB. to be paid to

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(答案→)A. be paid to spelling
B. to be paid to spelling
C. should pay to spelling
D. and spelling be paid to
解析：require后接的宾语从句中要用“(should) + 动词原形”形式。另外pay attention to后接名词或动名词。