In the United States, trade unions encountered far more inte

[alohabrian]

Source: SC-1000-420

[Deleted because this question is from a banned source - see below.]

the key:B

Hi, dear MG Staff. I have qusetions on this problem. Why B is the best answer? A non-native speaker, i think that the construction "in their struggle" does not clearly state against which the opposition is, and therefore changes the meaning of orignal sentence. Besidies, whether the "did" in Choice B can be removed? It seems to me that the omission of "did" does not generate any ambiguity in the comparison between "trade unions" and "Labour movements". In fact, i prefer Choice A to B.

[StaceyKoprince]

Please read (and follow!) the forum guidelines before posting.

1000SC is a banned source because it illegally uses copyrighted problems without permission. (And, even if it didn't, we'd ban it anyway - a lot of the problems in the set are fine, but there are a number of bad ones that can actually mess up your study if you use them!)