{01}The problem ________ this material can be used in our factory has been solved.
A.that
B.what
C.whether
D.why
解析:考查同位语从句。That引导的同位语从句That this material can be used in our factory说明The problem的内容。 本题选A。 {02}John got his phone for his birthday, his parents don’t let him use it in school.
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