1) 1. Which of the following assumptions about early humans is expressed in the passage? a) They probably had extensive knowledge of plants. b) They thought there was no need to cultivate crops. c) They did not enjoy the study of botany. d) They placed great importance on the ownership of property. 2) What does the word "vaguest" in line 4 mean? a) Unclear meaning. b) Reasonable. c) Clear. d) Determinate. 3) What does the comment "this is logical" in line 8 mean? a) There is no clear way to determine the extend of our ancestor's knowledge of plants. b) It's not surprising that early humans had a detailed knowledge of plants. c) It is reasonable to assume that our ancestors behaved very much like people in pre-industrial societies. d) Human knowledge of plants is well organized and very detailed. 4) In line 25, what is the author's purpose in mentioning "a rose, an apple, or an orchid"? a) To make the passage more poetic. b) To cite examples of plants that are attractive. c) To give botanical examples that all readers will recognize. d) To illustrate the diversity of botanical life. 5) Why do people examine different species of plants? a) To discover new medicines to treat our illnesses b) To know more about plants. c) To investigate more about plants. d) To represent the examples of plants.

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