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题库 / OG12-SC-3
Although various eighteenth- and nineteenth-century American poets had professed an interest in Native American poetry and had pretended to imitate Native American forms in their own works, until almost 1900, scholars and critics did not begin seriously to study traditional Native American poetry in native languages.
until almost 1900, scholars and critics did not begin seriously to study
until almost 1900 scholars and critics had not begun seriously studying
not until almost 1900 were scholars and critics to begin seriously to study
it was not almost until 1900 when scholars and critics began to seriously study
it was not until almost 1900 that scholars and critics seriously began studying
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教训总结：不要纠结是ing还是to do;这不是考点；
注意：
修饰副词的位置，本体seriously, almost,介词短语A中的until almost 1900,
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