[Sentence Correction]

A Harvard anthropologist has proposed that using fire to cook food could be dated back to almost two million years and that it could explain hominid features like having a large brain and small teeth.

[Sentence Correction]

Finally reaching a decision on an issue that has long been politically charged

in the Pacific Northwest, politicians decided to postpone by at least five years

an ambitious plan to protect wild salmon and other endangered fish, instead

of which they proposed a series of smaller steps, by which they intend to

protect the fish.

[Sentence Correction]

Finally reaching a decision on an issue that has long been politically charged in the Pacific Northwest, politicians decided to postpone by at least five years an ambitious plan to protect wild salmon and other endangered fish, instead of which they proposed a series of smaller steps, by which they intend to protect the fish.

[Multi-Source Reasoning]

 For each of the following results of tests performed on Kaxna artifacts, select Yes if, based on the museum's assumptions, the result confirms that the artifact was created during the time of the Kaxna Kingdom. Otherwise, select No.

[Multi-Source Reasoning]

For each of the following results of tests performed on Kaxna artifacts, select Yes if, based on the museum's assumptions, the result confirms that the artifact was created during the time of the Kaxna Kingdom. Otherwise, select no.

[Multi-Source Reasoning]

For each of the following results of tests performed on Kaxna artifacts, select Yes if, based on the museum's assumptions, the result confirms that the artifact was created during the time of the Kaxna Kingdom. Otherwise, select No.

[Reading Comprehension]

According to the passage, before the discovery of new techniques for detecting viral DNA, population ecologists believed that viral diseases

[Reading Comprehension]

According to the passage, before the discovery of new techniques for detecting viral DNA, population ecologists believed that viral diseases

[Reading Comprehension]

According to the passage, before the discovery of new techniques for detecting viral DNA, population ecologists believed that viral diseases

[Reading Comprehension]

According to the passage, before the discovery of new techniques for detecting viral DNA, population ecologists believed that viral diseases