Предмет: Английский язык, автор: аоаооо

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The results of the experiment (must/to check) before they were shown.

Ответы

Автор ответа: Sashaka12
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Ответ:

The results of the experiment must be checked before they were shown.

Объяснение:

This is the sentence related to "modal + passive* subject.  

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