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
句型宝典之比较句五
句型宝典否定句型8
词义解析mope,mortify,mosh
句型宝典之比较句六
句型宝典之含关系词句3
容易混淆拼错的单词
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句型宝典之含代名词句3
英文标点符号的使用3
英语写作必背200句1
句型宝典否定句型6
句型宝典2
LET引导的祈使句
虚拟语气十八例及练习
句型宝典之含不定词句5
句型宝典否定句型5
句型宝典否定句型7
句型宝典之含关系词句2
英文标点符号的使用2
英语写作技巧
句型宝典含分词句1
说明文的写作
句型宝典1
句型宝典否定句型9
英语写作必背200句2
句型宝典含动名句2
三十五个经典句型帮你写作过关
句型宝典否定句型10
句型宝典之含关系词句4
表示“各类人”的英语词缀
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