8.In the passage, the “rug” (Para. 4) is ().

104. The best title for this passage would be ().

103. It can be inferred from the passage that ().

102. The harm radiation has done to the Apollo crew members ().

101. We know from the passage that ().

100. According to the first paragraph, the atmosphere is essential to man in that ().

99. The main idea of the last paragraph is that people have ().

98.The expression get across to children" in the last paragraph probably means "()"."

97.Which of the following statements is true?

96.In the second paragraph the author lists the kinds of books ().

95.Reworked" as used in Paragraph 1 means "()"."