— Linda, shall we go and watch the Flower Festival Party in April?
— we have the tickets.
A. If
B. Unless
C. Because
D. Since
网友回答
A. If
(答案→)B. Unless
C. Because
D. Since
解析：A. If 假如 B. Unless 除非，只要 C. Because 因为 D. Since自从；句意：琳达，四月份，让我们去看花卉展览吧。只要我们有门票。故选B