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5. What do you know about educators and business leaders from Paragraph 1?
A. They will play together.
B. They have nothing in common.
C. They share the same goals.
D. They will partner with each other.
6. What is the best way to prepare children for a successful future?
A. Mixing STEM skills with DIY activities.
B. Developing specific technologies.
C. Focusing on STEM skills.
D. Relating to subject matter.
7. Why does the author mention NASA's best well-rounded problem solvers in Paragraph 3?
A. To stress the benefits of skills.
B. To show the findings of NASA.
C. To explain the ways of tinkering.
D. To prove the importance of tinkering.
8. What does the author advise schools and communities with limited resources to do?
A. Add teaching materials.
B. Employ handy resources.
C. Introduce advanced technology.
D. Provide problem-solving opportunities.

Ⅱ. 七選五
As we all know, the world has a plastic problem—and it is increasing. Scientists are working to find a long-term solution by making plastic more biodegradable (可生物降解的). 9 ________
Quit using plastic bags. 10 ________ People use a trillion plastic bags worldwide every year. About 10 percent are reused in the United States alone. That's almost one bag per American per day. In contrast, the average Danish use four single-use bags per year. Today, other countries (such as Germany and New Zealand) either make customers pay for plastic bags or have stopped using them completely.
11 ________ Today, around 8.3 billion plastic straws (吸管) pollute the world's beaches. So when you order a drink, say no to the straw, or bring your own reusable one. In 2018, Seattle became the first major U.S. city to ban plastic straws, and many other cities are set to follow its example.
Don't use plastic bottles. Buy a reusable bottle and fill it with any type of drink you like. Some cities, like Bundanoon in Australia and San Francisco in the U.S., have completely or partially (部分地) started quitting bottled water. 12 ________
Avoid plastic packaging. Buy bar soap instead of liquid soap in plastic containers. Don't buy fruit or vegetables in plastic packaging. 13 ________ They also want to tax plastic takeout containers.

單元知識(shí)回顧
Ⅰ. 高頻單詞識(shí)記
1. n. & vt. 挑戰(zhàn);質(zhì)疑→ adj. 挑戰(zhàn)性的
2. adj. 積極樂觀的;良好的,正面的→ (反義詞)→ adv. 樂觀地,積極地;絕對(duì)地
3. n. 進(jìn)步,進(jìn)展;前進(jìn),行進(jìn) vt. & vi. 發(fā)展,進(jìn)步→ adj. 先進(jìn)的
4. adj. 令人大為驚奇的,令人驚喜的→ adj. 感到吃驚的→ vt. 使大為吃驚,使驚奇→ n. 驚奇,驚愕,詫異
5. n. 信心,信任;把握→ adj. 有信心的
6. adj. 相等的;平等的;相當(dāng)?shù)?n. 同等的人(物) linking v. 與……相等 vt. 比得上→ adv. 平等地;平均地→ n. 平等;相等
7. vt. 同等重視;(使)保持平衡;權(quán)衡重要性 n. 均衡,平衡;平衡能力→ adj. 保持(或顯示)平衡的
8. vt. & vi. 改進(jìn),改善→ n. 改進(jìn),改善;改進(jìn)的事物
9. adj. 有責(zé)任,負(fù)責(zé);可靠的→ (反義詞)→ n. 責(zé)任,職責(zé)
10. adj. 自主的,有主見的;自立的→ (反義詞)→ n. 獨(dú)立,自主→ (反義詞)→ n. 依賴,依靠
11. n. 焦點(diǎn),重點(diǎn) vt. & vi. 集中→ adj. 集中注意力的
12. vt. 以……為基礎(chǔ)(依據(jù)) n. 根據(jù);基礎(chǔ);基底;總部,大本營→ adj. 基本的
13. n. 提議,建議,動(dòng)議→ vt. 建議;打算;求婚
14. n. 目標(biāo),目的 vi. & vt. 力爭做到;目的是;針對(duì)→ adj. 沒有方向的,無目標(biāo)的,無計(jì)劃的
15. n. 技巧,技藝;技能→ adj. 技術(shù)的,技能的→ n. 科技
16. adj. 職業(yè)的,專業(yè)的;有職業(yè)的;嫻熟的,精通業(yè)務(wù)的 n. 專門人員,專業(yè)人士→ n. 職業(yè);業(yè)內(nèi)人士
17. n. 貢獻(xiàn);捐款;捐贈(zèng)→ vi. & vt. 是……的原因之一;捐贈(zèng),捐獻(xiàn);增加,添加
18. adv. 幸運(yùn)地,幸虧→ (反義詞)→ adj. 幸運(yùn)的→ n. 運(yùn)氣;巨款;命運(yùn)
19. n. 可選擇的事物,選擇;選修課→ adj. 可選擇的
20. vt. 吸引,使喜愛;招引;引起(反應(yīng))→ n. 吸引力;向往的地方→ adj. 有吸引力的,誘人的