When it comes to____his classmates with...

When it comes to____his classmates with the homework, he never feels tired.

A．help

B．helping

C．give help

D．offer help

B 【解析】考察词组用法，此处to是介词，后面要跟doing形式，句意为，当涉及到帮助他的同学做作业，他从来不感到累

考点分析：

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