You can get the best result ______you carry out the experiment under the desired conditions.
A．what ifB．even ifC．only ifD．a(chǎn)s if
C

試題分析：考查連詞：A. what if倘若…又如何？B. even if即使，C. only if只有如果…，D. as if好像，句意：只有你在需要的條件下做實(shí)驗(yàn)才能得到最好的結(jié)果。選C。
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