【正确答案】 C

【答案解析】grasp：抓住。take hold of：抓住；控制住。Mother took hold of the barking dogs by their collars．母亲抓住了这些汪汪直叫的狗的颈圈，把它们制服了。understand：懂得；理解。I don't understand your attitude at all．我一点也不理解你的态度。grasp也有“懂得”的意思，但在该句中不是这个意思。have a hold over：控制；对……有影响。The officer has kept a firm hold over the soldiers．那个军官一直紧紧地控制着士兵。leave hold of：放开。She left hold of his hand．她放开了他的手。