问题
(2009宁夏银川模拟) In an experiment, pet owners are being encouraged to take their pets to work, a move _______ can be good for both the people and the pets
A:that some scientists say
B:in which some scientists say
C:some scientists say that
D:some scientists say
B:in which some scientists say
C:some scientists say that
D:some scientists say
正确答案是：
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