It is time for class. Will you please get the blackboard?A. to clean B. cleaningC. cleaned

问题补充：

It is time for class. Will you please get the blackboard?

A. to clean

B. cleaning

C. cleaned

D. having cleaned

答案：

A. to clean

B. cleaning

(答案→)C. cleaned

D. having cleaned

解析：考察使役动词用法。Have get等使役动词后面加动词的过去分词，表示把某事做了。根据题意，请你把黑板擦了好吗？选C。