He made a promise__________he earned money, he would build a new school to he...

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问题 He made a promise__________he earned money, he would build a new school to help develop education.

选项 A.what
B.that
C.that if
D.what if

答案C

解析考查同位语从句和条件状语从句。句意为“他许诺如果他挣了钱,就会建一所新学校来发展教育”。此处that引导同位语从句,用来说明promise的具体内容。同位语从句里包含了一个条件状语从句。故选C。
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