Don't press the red button ,_______you will set off the alarm.
A．butB．orC．soD．a(chǎn)nd
B

試題分析：考查固定句式。題意：不要按紅色按鈕，不然警報就會拉響�！捌硎咕�，and / or … ”是一個固定句式，“祈使句”相當(dāng)于一個“條件”，符合該條件就會有后面的結(jié)果，用and；不符合該條件就會有后面的結(jié)果，用or。本題or =" if" you press the red button。故B項正確。
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