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Howdidyoutrytogettoschoolontime

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問題詳情:

Howdidyoutrytogettoschoolontime

How did you try to get to school on time ______ you missed the school bus, Mary?

A. when                      B. if                            C. once                        D. that

【回答】

A

解析:用來引導時間狀語從句。

知識點:連詞

題型:選擇題

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