A.By busB.On footC.By underground.D.By bicycle.

【答案】D

【解析】

【原文】

W: Tomorrow is Sunday. Let's have a picnic in the park.

M: That's a good idea. Shall we go there by bus?

W: It's not far away from here. Let's go by bicycle.

Q: How will they go for a picnic? (D). Q How will they go or a plane (D)