If we ________ careful, fire can be dangerous.
A.don’t beB.a(chǎn)reC.won’t beD.a(chǎn)ren’t
D
如果我們不小心,火會(huì)很危險(xiǎn)。從句意來(lái)看前面應(yīng)是否定意思。主句用may/might/can 時(shí),if從句用一般現(xiàn)在時(shí)。所以選D。
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