---We will have a school trip next week.---That sounds .I’m sure we will have a good time.

问题补充：

---We will have a school trip next week.

---That sounds .I’m sure we will have a good time.

A. well

B. bad

C. greatly

D. good

答案：

A. well

B. bad

C. greatly

(答案→)D. good

解析：sounds在此处是系动词，后面要加形容词，由题意得知这个主意很好，故选D.