—I think it's useful ________ a second language. —Me too. A. learn B. to learn C. learning D. to lea...
2022-11-04 00:39:03 35次 2017-2018学年七年级英语下册（人教版）：Unit 12 综合水平测试 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
—I think it's useful ________ a second language.
—Me too.
A. learn B. to learn C. learning D. to learning
本题链接：
