—It’s already nine o’clock.Would now be a(n) moment to show the sides?—OK go ahead please.

问题补充：

—It’s already nine o’clock.Would now be a(n) moment to show the sides?

—OK,go ahead please.

A. necessary

B. gradual

C. suitable

D. important

答案：

A. necessary

B. gradual

(答案→)C. suitable

D. important

解析：根据上下文，此处应是“合适的机会”之意，其他形容词不合句意。