2. 外语
  3. Factory workers (had to) work (very hard) before, (so) (had farmers).

Factory workers (had to) work (very hard) before, (so) (had farmers).

admin2008-12-13  57
问题 Factory workers (had to) work (very hard) before, (so) (had farmers).
选项 A、had to
B、very hard
C、so
D、had farmers
答案D
解析 应改为did farmers。以so开头的倒装句，可以用助动词do／did／does代替前面的动词。
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成人本科学位英语

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