小测验：选择正确的单词

1. From the hilltop we saw the blue ocean below.
   从山顶上我们看见了下面蓝色的海洋。
2. We can see a fine view of the West Lake from the hilltop.
   从山顶我们可以西湖的秀丽景色尽收眼底。
3. The pavilion on the hilltop was a well-known landmark.
   山顶上的亭子是个著名的陆标。
4. emplace a fortification on the hilltop.
   在山顶修筑了防御工事
5. The signal flamed out on the hilltop.
   山顶上突然冒出火焰作信号。

　1个名词解释