句型转换,用it作主语改写句子
1.Toplayfootballisveryinteresting.
2.TolearnEnglishwellisimportant.
3.TospeakEnglishlikethatisnotpolite.
4.Totravelbyaircanbequiteeasy.
5.Toarrivetherebeforenoonwillbenoproblem.
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