2 . Water is becoming an increasingly ________ resource for many factors. If all the countries fail work together to save it and protect it, the last drop of water on the earth is our tears.

A．precious

B．previous

C．flexible

D．available

3 . With many activities __________ (可获得的), students often find it difficult to strike a balance between academic pursuits and personal interests. （根据汉语提示单词拼写）

6 . 根据语境，选择下框中的单词替换句中划线部分的词或词块，使之意思一致。

potentially     distinct     objectives     available     apparently     remarkable     encountered

1. Personally, I used to try effective way to achieve my academic goals. ____________
2. I came across many hikers who were headed to a distant camp-ground with just enough time to get there before dark . ____________
3. It is important to make food and water accessible to the survivors . ____________
4. The two flowers are different from one another, so it’s easy to make a distinction between them.__________
5. I think Huang Danian was a truly extraordinary scientist. _______________
6. We will probably benefit from remote-controlled houses.______________
7. I wasn’t there, but obviously the opening ceremony of Hangzhou Asian Games was amazing._____________

7 . The director was not          for comment, for he was occupied with something else for the time being.

A．convenient

B．reputed·

C．available

D．distinguished