. It is only when we cannot see clearly _____ we come to see ______ important our eyes are.
A.that; what | B.which; what | C.that; how | D.which; how |
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. It is only when we cannot see clearly _____ we come to see ______ important our eyes are.
A.that; what | B.which; what | C.that; how | D.which; how |