30. The price should have made you realize it was a trick.A. aloneB. justC. simpleD. Only

问题补充：

30. The price should have made you realize it was a trick.

A. alone

B. just

C. simple

D. Only

答案：

(答案→)A. alone

B. just

C. simple

D. Only

解析：可联系答.案.网客服索取。