She is wearing the sweater that (buy) by her fathe
1个回答

答案:bought

分析:

此句可以翻译为:她穿着她父亲上个月给她买的毛衣.

前面是be+ing形式表示她正穿着,而同一个句子中不可能用两个动词,所以that后面是助动词,应当跟后面的时态,即last month-上个月,就是过去式,用bought