_________ difficult the task may be, we must finish it on time, because we can’t meet such a precious opportunity _______ we have expected.
A．Whatever; thatB．However; as
C．However; thatD．Whatever, which
B
句意：無論這個工作有多困難，我們必須如期完成，因為我們不可能再遇到正如我們期望的這樣的好機會。However =" No" matter how修飾形容詞 difficult, 而在定語從句中先行詞有such 修飾，關(guān)系詞用as，因此答案B是正確的。
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