3 To tell the time, the

Заполним пропуск в предложении.

В тексте находим информацию: The Mississippians even made a calendar; they used wooden poles and the sun to tell the time.

Следовательно, пропуск нужно заполнить словами they used wooden poles and the sun.

To tell the time, they used wooden poles and the sun.

Ответ: To tell the time, they used wooden poles and the sun.