Question

根据句意，填入适当的介词

Tim can't move because ________ his sore back.

Answer 1

答案：of
解析：

because意为“因为”，引导原因状语从句；但题中his sore back为短语，而非句子，故加入介词of，because of意为“因为……”，接名词、代词或动名词。