MygrandfatherusedtobuildrailwaysfortheJapanesearmywhenh...

问题详情：

My grandfather used to build railways for the Japanese army when he was young. He was 　　　 to work hard from morning till night.

       A. invited                  B. encouraged    

       C. allowed                D. forced

【回答】

D

知识点：动词语态

题型：选择题