--Tomorrow will be sunny. How about having a picnic in the park?-- But I have to prepare f

问题补充：

--Tomorrow will be sunny. How about having a picnic in the park?

-- But I have to prepare for tomorrow’s exam.

A. I’d love.B. I’d love to. C. That’s right.

答案：

解析：在英文中对于别人的邀请我们可以用很愿意的句子I’d love to，然后用but表示委婉的拒绝，故本题选B。