If it sunny tomorrow I the Great Wall.A. will be climbB. is climbingC. will am climb

问题补充：

If it sunny tomorrow, I the Great Wall.

A. will be, climb

B. is, climbing

C. will, am climbing

D. is, am going to climb

答案：

A. will be, climb

B. is, climbing

C. will, am climbing

(答案→)D. is, am going to climb

解析：句意：如果明天晴，我打算去爬长城。结合语境可知本句主句描述的是将来发生的动作，故用一般将来时态。当主句描述将来动作时，条件状语从句中用一般现在时态表示将来动作，故选D。