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单项选择 较易0.85 引用1 组卷282
Some theories believe ____ quality input ensures quality output in English learning.
A.how
B.that
C.why
D.what
17-18高二下·北京海淀·期中
知识点:that,if, whether引导的宾语从句 答案解析 【答案】很抱歉,登录后才可免费查看答案和解析!