—This physics problem is too difficult. Can you show me _______, George?
—Sure.
A．what to work outB．to work it outC．how to work it outD．how to work out it
C
四個選項分別表示解決什么，解決它、怎樣解決它和怎樣解決它（不合語法），人稱代詞作動詞短語的賓語時，一般要放在動詞后面介詞前面，所以選C。
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