SAT R&W W55: Verbs — Mixed Practice

The collection of seed samples that the institute keeps in a tunnel cut into a frozen mountainside on an island north of the Arctic Circle duplicates of crops held in more than seventeen hundred smaller banks around the world.

Radiocarbon dating gave the wooden posts a date of about 800 BCE, but the pottery lying beside them belonged to a style that potters in the region two centuries earlier. The excavators concluded that the posts had been driven through an older layer.

A bridge whose deck is hung from cables that pass over two towers and are anchored in blocks of concrete at either end far less material than a bridge of the same span carried on arches.

Sourdough rises without commercial yeast, and the wild organisms that raise it also acidify the dough as they work, the loaf a keeping quality that a yeasted bread of the same flour does not have.

Neither the two surviving letters nor the ledger kept by the workshop a price for the altarpiece, so how much the guild actually paid for it remains unknown.

The observatory has kept an unbroken record of sunspot counts since 1874. Because the instrument and the observing routine essentially unchanged since the very first count was made, the series is one of the few in astronomy that can be compared directly across its whole span.