1 . 关键问题是我们对在线学习应持有什么样的态度。
The key problem is ________.

2 . Determination and optimism are ________ it takes to conquer your fear and accomplish your goal. (用适当的词填空)

3 . 植物非常重要。这是因为植物在维持生态平衡方面扮演着重要的角色。(ecology) (汉译英)
_____________________________________________________________________________

4 . Many people love to read this collection of poems. The reason is that they can feel the warmth of love and enjoy the innocence of childhood. (用关系代词或副词合并)
____________________________________________________________________________

5 . 这就是为什么它读起来那么好，我们发现它很容易记住。（汉译英）
_________________________________________________________________________________

7 . 这就是为什么我认为长江之行将是一个更好的选择。
________________ I think the trip along the Yangtze River will be a better choice.

9 . 给我留下深刻印象的是，每当我遇到困难，我的叔叔都会激励我坚持我的梦想。
________________my uncle will always motivate me to stick to my dream whenever I come across difficulties.