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题库 / Prep2007E1-SC-140
In human hearing, subtle differences in how the two ears hear a given sound help the listener determine the qualities of that sound.
in how the two ears hear a given sound help the listener determine
in the two ears hearing a given sound help the listener in determining
in how a sound is heard by the two ears helps the listener determine
between how the two ears hear a given sound helps the listener in determining
between how a sound is heard by the two ears help the listener in determining
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So use "in" with a single object, and "between" with a pair of objects.
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