When to F1 I have little knowledge to if.A. I comeB. they comeC. we comeD. it comes

问题补充：

When to F1, I have little knowledge to if.

A. I come

B. they come

C. we come

D. it comes

答案：

A. I come

B. they come

C. we come

(答案→)D. it comes

解析：考查固定句型。 When it comes to---意为“当提及、谈及”