单项选择题

Which of the following statements about Flowers and Yeo is true

A．They are students at Sussex University.
B．They are rice breeders.
C．They are husband and wife.
D．They are colleagues at an institution of higher learning.

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单项选择题

The word affect in Paragraph 6 could be best replaced by

A．"influence".
B．"effect",
C．"stop".
D．"present".

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.