第三册：培养技能 · 单元 1 复习与自测 · 第12–20课
单元导读 · 单元语法总结 · 单元单词与短语 · 单元复习与自测
先独立作答，再展开答案。下列原创题从相应课时选取，覆盖本范围每一课；错题请回到课时讲解解释错误原因，再替换一个条件重做。
Lesson 12 · 第二条件句的假设距离
阅读材料（本站原创）： If I lived on a remote island, I would choose a reliable radio over a television.
练习 1
例句中的 lived 是否说明说话者以前住过岛上？
参考答案与解析
答案： 不是。
解析： 过去式用于表达假设距离。
表达迁移： 为独处一周的虚构情境列出一个优先物品、一个理由和一个限制。
表达参考与点评
If I stayed in a remote cabin, I would bring a radio. It could help me receive weather warnings. I would still need a safe way to leave in an emergency.
所有选择围绕具体需求，最后一句补足单一工具无法解决的限制。
Lesson 13 · 强调句的焦点
阅读材料（本站原创）： It was the gardener's voice that finally reassured the visitor.
练习 1
还原例句为普通句。
参考答案与解析
答案： The gardener's voice finally reassured the visitor.
解析： 删除强调框架后保留完整主谓宾。
表达迁移： 写三句身份误会，最后用强调句说明消除误会的线索。
表达参考与点评
A tall figure stood behind the curtain. I thought a stranger had entered the room. It was my sister's laugh that made me relax.
先展示视觉误导，再交代推测，最后突出可靠的声音线索。
Lesson 14 · although 与 despite
阅读材料（本站原创）： Although the businessman funded a clinic, his illegal methods still harmed the community.
练习 1
改写：Although she was wealthy, she lived simply.（用 despite）
参考答案与解析
答案： Despite being wealthy, she lived simply.
解析： 介词后用动名词结构。
表达迁移： 用三句评价一位虚构人物，承认贡献，再说明具体问题和判断标准。
表达参考与点评
Although the director created many jobs, she ignored repeated safety complaints. Several workers had to replace damaged equipment themselves. A fair assessment must consider both employment and working conditions.
评价建立在两类具体行为上，最后一句明确衡量维度。
Lesson 15 · 数量修饰语与 worth
阅读材料（本站原创）： A two-minute repair saved a toy worth only three pounds.
练习 1
填空：It is worth ___.（repairing/to repair）
参考答案与解析
答案： repairing
解析： worth 后可接动名词。
表达迁移： 用三句写一个小物件造成的麻烦，包含价值和处理时长。
表达参考与点评
A cheap token became trapped in the machine. A fifteen-minute inspection revealed a bent metal strip. The token was worth little, but the delay affected the whole queue.
物件价值与延误成本分开叙述，复合形容词准确限定检查时间。
Lesson 16 · one、it 与名词替代
阅读材料（本站原创）： Of the two lambs, the one with a dark ear belonged to our neighbour.
练习 1
填空：My cup broke, so I bought a new ___.
参考答案与解析
答案： one
解析： 表示同类中的另一个可数物品。
表达迁移： 用三句区分两件相似物品，正确使用 one 与 it。
表达参考与点评
Two grey coats were left in the hall. The one with wooden buttons is mine. I will collect it after the meeting.
one 选择同类中的某件，it 再指已经确定的那件外套。
Lesson 17 · 最高级的范围与倍数
阅读材料（本站原创）： The new footbridge is twice as long as the wooden one it replaced.
练习 1
旧桥长40米，例句中的新桥多长？
参考答案与解析
答案： 80米。
解析： twice as long 表示两倍长度。
表达迁移： 给两座虚构桥梁写三句比较，注明指标和范围。
表达参考与点评
Bridge A has a central span of eighty metres. Bridge B's central span is twice as long. Among the three bridges in our model, Bridge B has the longest central span.
三句使用同一指标 central span，并给出最高级的比较集合。
Lesson 18 · 感官动词后的补语
阅读材料（本站原创）： We watched the metal rings rotating while a low tone filled the room.
练习 1
改正：I heard the bell to ring.
参考答案与解析
答案： I heard the bell ring.
解析： 主动 hear 加宾语后用动词原形表达动作事实。
表达迁移： 用三句描述一件虚构互动作品，先写观察，再写机制和感受。
表达参考与点评
I noticed a red disk moving behind the glass. It slowed down when visitors stopped clapping. The changing rhythm made the room feel unexpectedly quiet.
前两句描述可观察变化，第三句才表达体验。
Lesson 19 · have 加宾语加过去分词
阅读材料（本站原创）： After the gate broke, we had a new lock fitted to keep the dog safely inside.
练习 1
填空：We had the fence ___.（repair/repaired）
参考答案与解析
答案： repaired
解析： 宾语 fence 承受修理动作。
表达迁移： 写三句宠物走失后的处理，包含安排服务和最终结果。
表达参考与点评
Our puppy escaped through a broken panel. We had the fence repaired that afternoon. A neighbour found the puppy near the bus stop.
维修安排与找回宠物是两个独立动作，没有暗示维修本身找回了宠物。
Lesson 20 · 过去将来时与计划结果
阅读材料（本站原创）： The pilot believed that the lighter engine would extend the aircraft's range.
练习 1
例句是否证明航程后来真的增加？
参考答案与解析
答案： 没有。
解析： 它只报告飞行员当时的判断。
表达迁移： 写三句虚构飞行试验记录，分别表达计划、阻碍和实际行动。
表达参考与点评
The team was going to test the glider on Monday. Strong winds made the hillside unsafe. They postponed the flight and inspected the frame instead.
第一句为过去计划，后二句明确未按计划进行，时间逻辑完整。
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