24. After retirement, Mr. Wang chose to live in an old folks’ home in order not to be a ____ to his
children.
(A) response (B) weight (C) burden (D) support
55. As the ice in the North Pole continues to melt, polar bears are losing their habitat. “Habitat”
means____.
(A) everyday habits (B) place to live
(C) space polar bears are used to (D) houses