1 . Some people take exercise lessons to improve their ________________ (concentrate) on a regular basis. (所给词的适当形式填空)

2 . We lacked ________________ (concentrate) in yesterday's football match and it cost us the goal and the game. (所给词的适当形式填空)

3 . According to the survey, three in ten drivers have experienced an accident for lack of ________________(集中) while driving. （根据汉语提示单词拼写）

4 . 词性转换
1. immediate→ _________[adv.] 立即，马上conj.一……就
2. concentrate→ [vi.]& [vt.]集中(注意力、思想等)；全神贯注→_________[n.]专心，专注；集中→_________[adj.]全神贯注的；集中的
3. extreme→ [adj.]极端的；严重的[n.]极端的感情(或境况、行为方式等)→_________「adv.]极端地；非常
4. effect→[n.]效果，作用；影响_________[adj.]有效的→[adv.]有效地；实际上________→[n.]效率；有效性
5. prove→ linking v.后来被发现是[vt]证明，证实____________[n.]证据，证明
6. slightly→ [adv.] 稍微，略微________→[adj.]轻微的；细小的________→[n.]些微，少许
7. nutrition→[n.] 营养________→ [adj.] 有营养的________→ [adv.]营养地，nutritionist[n.]营养学家
8. [vi.]起作用，正常工作，运转[n.]作用，功能，职能_________[adj.]实用的；功能的 ________→[adv.]功能地；职务上地
9. energetic→ [adj.]精力充沛的，充满活力的energy[n.]能量；精力→_________ [adv.]精力充沛地；积极地
10. frightened→[adj.]害怕的，惊吓的，受惊的fright→[n.]惊吓；恐怖→_________[adj.]令人惊恐的，骇人frighteningly→ [adv.] 吓人地，令人恐惧地
11. memory→[n.]记忆力，记性；记忆，回忆→_________[vt.]记忆，记住memorial→ [n.]纪念碑 [adj.]纪念的
12. _________[n.] 发作；攻击；抨击[vt.]& [vi.] 攻击；侵袭;attacker[n.]攻击者；抨击者

7 . There is a need for greater ________ (concentrate) on environmental issues. (所给词的适当形式填空)

8 . The area has one of the world’s greatest concentrations of wildlife. （英译汉）

9 . I found it hard to follow what the teacher was saying, and eventually I lost ________(专注，专心).(根据汉语提示单词拼写)