5.Correct Answer: D
Explanation:
Clue: The sentence structure suggests that if biological clocks are a great advantage, then most organisms would possess them.
Therefore, the obvious value, leads us to expect that organisms possess the
6.Correct Answer: A
Explanation:
Clue: the part after the comma expands on what has been stated. Also note the word least, which here means not.
Therefore, the peasants were least free, because they were fettered by superstition.
7.Correct Answer: B
Explanation:
Clue: However indicates that the first part of the sentence is contradicted by the second.
Therefore, if people once believed that spices preserved food, then the person mentioned found that spices did not preserve food, and in fact the spices were teeming bacteria etc. that could destroy the food.
8.Correct Answer: E
Explanation:
Clue: but indicates something contradictory.
So, if the waves are not absorbed they travel on indefinitely , but the intensity gets less as they travel away.
Remember, the sentence has to make the best sense, so saying that sound intensity increases as the waves travel is counter to common sense.
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