He found very difficult the math problem. A.that；to solveB.this；solving C.it；to solve D.it；solving
2023-01-27 17:49:27 128次 2015届浙江省台州市九年级上学期第一次月考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
He found very difficult the math problem.
A.that；to solveB.this；solving
C.it；to solve D.it；solving
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