单项选择题

The overall effect of this passage is likely to make the reader feel ______.

A．enthusiastic about biotechnology
B．very worry about genetic engineering
C．reluctant to try new plant combinations
D．alarmed about limitless experiment

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热门试题

单项选择题The word boon at the end of paragraph 1 is closest in meaning to ______.

A．success
B．accomplishment
C．dream
D．benefit

单项选择题All of the following aspects of backpacking are discussed in the passage except ______.

A．wearing several layers of clothing
B．getting maximum use from your pack material
C．improving the warmth of your sleep
D．forecasting the weather