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Tom has much difficulty _____Chinese so he often asks me ______help.
A．understanding; forB．understanding; of
C．to understand; forD．to understand; for
A
表示在某方面有許多困難可以說(shuō)have much difficulty（in）doing，表示向某人尋求幫助可以說(shuō)ask sb for help，故選A。
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