I’ll pay you double. You get the report finished by Friday, (com

I’ll pay you double. You get the report finished by Friday, (complex sentence)
【正确答案】：I’ll pay you double if you get the report finished by Friday.
【题目解析】：本句的要求是将两个单句变成一个复合句（complex sentence）。我们发现上面两个单句是条件关系，即我会付你双份，（如果）你能在周五前完成报告。所以我们用if来连接。