二、原因篇
1.A number of factors are accountable for this situation.
A number of factors might contribute to the phenomenon.
2. The answer to this problem involves many factors.
3. The phenomenon mainly stems from the fact that...
4. The factors that contribute to this situation include...
5. The change in ...largely results from the fact that...
6. We may blame ...,but the real causes are...
7. Part of the explanations for it is that ...
One of the most common factors is that ...
Another contributing factor is ...
Perhaps the primary factor is that
But the fundamental cause is that ...
新概念英语第一册 Lesson 77:Terrible toothache
新概念英语第一册 Lesson 111:The most expensive model
新概念英语第一册 Lesson 83:Going on holiday
新概念英语第一册 Lesson 93:Our new neighbour
新概念英语第一册 Lesson 105:Full of mistakes
新概念英语第一册 Lesson 71:He’s awful
新概念英语第一册 Lesson 63:Thank you,doctor
新概念英语第一册 Lesson 109:A good idea
新概念英语第一册 Lesson 73:The way to King Street
新概念英语第一册 Lesson 41:Penny’s bag
新概念英语第一册 Lesson 119:A true story
新概念英语第一册 Lesson 65:Not a baby
新概念英语第一册 Lesson 47:A cup of coffee
新概念英语第一册 Lesson 131:Don’t be so sure
新概念英语第一册 Lesson 113:Small change
新概念英语第一册 Lesson 135: The latest report
新概念英语第一册 Lesson 79:Carol’s shopping list
新概念英语第一册 Lesson 69:The car race 汽车比赛
新概念英语第一册 Lesson 123: A trip to Australia
新概念英语第一册 Lesson 103:The French test
新概念英语第一册 Lesson 133:Sensational news
新概念英语第一册 Lesson 43:Hurry up
新概念英语第一册 Lesson 81:Roast beef and potatoes
新概念英语第一册 Lesson 97:A small blue case
新概念英语第一册 Lesson 121:The man in the hat
新概念英语第一册 Lesson 95:Tickets,please
新概念英语第一册 Lesson 55:The Sawyer family
新概念英语第一册 Lesson 53:An interesting climate
新概念英语第一册 Lesson 137:A pleasant dream
新概念英语第一册 Lesson 125:Tea for two
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