In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each number.
Hunter-gatherer culture was the way of life for early humans until around 11,000 to 12,000 years ago. The lifestyle of hunter-gatherers was (1) ______ on hunting animals and foraging for food. Anthropologists (2)______ discovered evidence for the practice of hunter-gatherer culture (3)______ modern humans (Homo sapiens) and their distant ancestors dating as (4)______ back as two million years ago. Before the (5)______ of hunter-gatherer culture, earlier groups relied on (6)______practice of scavenging animal remains that predators left (7)______. Because hunter-gatherers did not rely on agriculture, (8)______ used mobility as a survival strategy. Indeed, (9)______ lifestyle required access to large areas of (10)______ to find the food they needed for survival.
Select the correct passive form of the given sentence.
Did you receive my letter?