Question

【题目】________ you are a middle school student, you should learn how to look after yourself．

A. Though

B. While

C. Since

D. Unless

Answer 1

【答案】C

【解析】试题分析：句意：既然你是中学生了，你应该学会自己照顾自己。 A. Though 虽然；B. While当……时候； C. Since自从，既然；D. Unless除非，根据句意及题干分析此处是表原因，所以选C。