In order to_____cutting-edge stem cell break-throughs to humans, they should be inexpensive and provide consistent results.

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问题 In order to_____cutting-edge stem cell break-throughs to humans, they should be inexpensive and provide consistent results.

选项 A、applied
B、apply
C、application
D、applying

答案B

解析 in order to后面应该使用动词原形，因此选择动词apply。

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