来自陈万军的问题
句子"themostimportantmethodsareexercisingyourbrainandtakingspecialcareofyourhealth."里面的"exercising"和"taking"为什么要加ing
句子"themostimportantmethodsareexercisingyourbrainandtakingspecialcareofyourhealth."
里面的"exercising"和"taking"为什么要加ing
