问题
选择题
Tom has much difficulty _____Chinese so he often asks me ______help.
A．understanding; for
B．understanding; of
C．to understand; for
D．to understand; for
答案
A
表示在某方面有许多困难可以说have much difficulty（in）doing，表示向某人寻求帮助可以说ask sb for help，故选A。