16. At the thigh bones meets the large bone of the lower leg there is the joint, called the knee, which moves like a hinge. (A)At(B) there(C) called(D)which

21. It can be inferred from the passage that Van West notes the severe droughts which affected the Anasazi prior to the Great Drought primarily in order to ______.(A) establish that enough food could have been grown to support the Anasazi's survival (B) affirm the notion that the Great Drought may have been exponentially more severe than prior droughts (C) suggest that the repetition of droughts was taking a cumulative toll on the fertility of the Plateau (D) argue that the Anasazi's past behavior would indicate their likely future behavior in the case of a Great Drought

16. At the thigh bones meets the large bone of the lower leg there is the joint, called the knee, which moves like a hinge.
(A)At
(B) there
(C) called
(D)which

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