－Theyweremade          foratleast12hoursadayintheoldday...

問題詳情：

－They were made           for at least 12 hours a day in the old days.

—Really ! That sounds terrible.

A. working                  C. to work         D. be working

【回答】

C 

知識點：非謂語動詞

題型：選擇題