That’s the new machine parts are too small to be seen.A. thatB. whichC. whoseD. what

问题补充：

That’s the new machine parts are too small to be seen.

A. that

B. which

C. whose

D. what

答案：

A. that

B. which

(答案→)C. whose

D. what

解析：考察定语从句，“这是那个零件小的看不见的机器。”the new machine和 parts存在所属关系，答案C。