单选题 ______ the workers put in a lot of effort, profits were not high.

A、 (A) Whatever
B、 (B) Why
C、 (C) Even though
D、 (D) However

【正确答案】 C

【答案解析】Even though indicates an unexpected result. Choice (A) means anything. Choice (B) is an interrogative word. Choice (D) indicates an unexpected result but must begin the result clause.