The 's in "what's" (l. 1) and "That's" (l. 1) is, respectively, the contraction of
The researchers believe that the people living in the Shandong province 5,000 years ago
Fill in the parentheses with T (True) or F (False).
About the skeletons of people mentioned in the text, the researchers say that they must have
( ) been much taller than the majority of people living at that time.
( ) belonged to a lower-middle class.
( ) been able to eat good-quality foods.
( ) been physically powerful and healthy.
The correct sequence, from top to bottom, is