题目内容
【题目】Business studies ______ a skill-based subject which ______ students’ ability to use their knowledge.
A. is; test
B. is; tests
C. are; test
D. are; tests
【答案】B
【解析】考察主谓一致。由句中a skill-based subject可知business studies指的是一门学科，谓语动词用单数形式；which代替a subject，谓语动词用单数形式。
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