单项选择题

The word "affect" in Paragraph 6 could be best replaced by

A．"influence".
B．"effect",
C．"stop".
D．"present".
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单项选择题
Flowers and Yeo have started a programme
A．to find ways to prevent water pollution.
B．to identify genes that promote growth in salty soil.
C．to breed rice plants that taste salty.
D．to find ways to remove excessive salt from soil.
单项选择题
The attitude of the author towards the research project is
A．positive.
B．negative.
C．suspicious.
D．indifferent.
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