Some theories believe ____ quality input ensures quality output in English learning. A. how B. that ...
2022-09-18 17:41:06 20次 北京市海淀区2017-2018学年高二第二学期期中英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Some theories believe ____ quality input ensures quality output in English learning.
A. how
B. that
C. why
D. what
本题链接：
