The farmers had the machine all day and night.A. workB. workingC. workedD. to work

问题补充：

The farmers had the machine all day and night.

A. work

B. working

C. worked

D. to work

答案：

A. work

(答案→)B. working

C. worked

D. to work

解析：句意：农民们让这台机器整日整夜工作着。固定结构have sth/sb doing sth表示“让(使)……一直做某事”。