The old man had to do all the farm work himself, ______?

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问题 The old man had to do all the farm work himself,  ______?

选项 A、did he
B、didn’t he
C、hadn’t he

答案B

解析 had to这儿是have to的过去式,所以反意问句用助动词did,前面陈述是肯定,后面用否定。
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