挑错题,factory workers (had to) work (very hard) before,(so) (had fa_英语解答

挑错题,factory workers (had to) work (very hard) before,(so) (had farmers).
factory workers (had to) work (very hard) before,(so) (had
a b c d
farmers).
请问为什么呢?这句话很别扭是什么意思呢?

人气：135 ℃　时间：2019-09-18 02:05:38

解答

D,had要改为did,have to 的助动词不是have,而是do,要熟记.
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