【題目】______we have enough evidence, we can't win the case.
A.Once
B.As long as
C.Unless
D.Since

【答案】C
【解析】句意:如果我們沒(méi)有足夠的證據(jù),我們不可能贏得這個(gè)案子。“我們有足夠的證據(jù)”和“我們不能贏得這個(gè)案子”之間的關(guān)系有可能是兩種:(1)讓步關(guān)系;(2)否定前面的意思。四個(gè)選項(xiàng)中,沒(méi)有表讓步關(guān)系的although/though,,那么答案就應(yīng)該是否定前面的意思,用unless,“如果我們沒(méi)有……,我們就不能……”;其他三個(gè)連詞明顯與句意不符,排除。

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