双基限时练(二) unit 1 part ⅱ 基 础 夯 实 ⅰ.单项填空 1．this printer is of good quality. if it ________ break down within the first year, we would repair it at our expense. a．would b. should c. could d. might 答案与解析 b 句意：这种打印机质量优良。如果它在第一 年中出了毛病，我们将无偿维修。这是在条件句中对将来情况的虚拟，谓语用“should＋动词原形”。
