點津：

詞根serve表示serve,表示服務。

Conserve:保護, 保藏, 保存

Conserve your energy, you'll need it!

保存你的精力, 你會用得著的！

Deserve:應受，值得

What crime have they committed to deserve such cruelty?

他們犯了什么錯，竟遭如此懲罰？

Observe：觀察，研究；遵循

He observes carefully but says little.他總是仔細觀察, 很少說話。

Preserve：保護；維持

We must preserve our natural resources.我們必須保護自然資源。

答案：Conserve, deserve, observe, preserve

Efforts to conserve the environment sometimes clash with the advancement of technology.

致力環境保護有時和發展技術相矛盾。

He can't deserve you.

他是沒有資格匹配你的。

As a child, he liked to observe the behaviour of insects.

他小時候喜歡觀察昆蟲的習性。

It is highly important to preserve the environment.

維護自然環境至關重要。