16.--- What’s the matter with you?

--- _______ the window, my finger was cut unexpectedly.

A. Cleaning           B. To clean              C. While cleaning     D. While I was cleaning

17. Do you know the trouble I have _____ the work?

A. to do                B. doing                   C. do                              D. done

18. The engine of the ship broke down and the bad weather _______ the helplessness of the crew at sea.

A. added to                  B. resulted from        C. turned out         D. made up