题目内容
（请给出正确答案）
[主观题]
The author of the selection believes that eye-movement investigations are ______.A．valuabl
The author of the selection believes that eye-movement investigations are ______.
A．valuable because they provide a picture of the ways the mind works in perceiving word symbols
B．worthless because eye movements have nothing to do with skillful reading
C．worthless because they tell us little about how expert readers' functions are
D．valuable because they tell us much about the way the eye is put together
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