two exams to worry about, I have to work really hard this weekend.
A. Besides
B. With
C. As for
D. because of
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A. Besides
(答案→)B. With
C. As for
D. because of
解析：考查With的复合结构用作状语，表伴随，用不定式或to worry about表将来的动作。句意：要担心两场考试，这个周末我要真的努力学习了。A. Besides此外， C. As for至于，D. because of因为，选B。