1.
Global financial crisis (27853 candidates) 

2.
Can / could/ may/ might (377625 candidates) 
3.
To let / to leave (3597 candidates) 
4.
By / until (25372 candidates) 
5.
Prepositions (18927 candidates)
6.
So / such (57427 candidates)
7.
Working conditions (44571 candidates) 
8.
Quantities (35655 candidates) 
9.
Past tense and present perfect (6471 candidates)
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Adjectives (3873 candidates) 
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So , neither (18708 candidates) 
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Vocabulary- Buying and selling (55482 candidates) 
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Labour Day (5485 candidates) 
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Business (19146 candidates) 

15.
Say/tell (37294 candidates) 
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Place of adverbs (105817 candidates) 
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Tags with so/neither (26376 candidates) 
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Exclamation (64479 candidates) 
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At the hotel (22370 candidates) 
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Wrong,hurt,pain etc (6140 candidates) 
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