【题目】____ they did not believe him, what would they do then?
A.Suppose
B.Supposed
C.I suppose
D.You suppose

【答案】A
【解析】【分析 】这题考查Suppose或Supposing做连词用，表示“如果”。句意是：如果他们不相信他，他们会怎么做？选A。