Question

【题目】How (keep) the balance between hobbies and homework is still a problem.

Answer 1

【答案】to keep
【解析】句意为：如何保持爱好与作业之间的平衡依然是一个问题。根据语境可知，这里是疑问词与动词连用，动词应用不定式，相当于“How I can +动词。结合所给词汇提示可知应填：to keep。