Ranked by: number of candidates
1.
Like / as / unlike (49334 candidates) 
2.
So / Neither (39879 candidates) 
3.
How and questions (39155 candidates)
4.
Quantity and measurement (26546 candidates) 

5.
Plural of words with -Y (17758 candidates)
6.
Sometimes, Some time, Sometime (12025 candidates)
7.
No/None .... (10256 candidates) 
8.
Talk/Speak/Chat/Discuss (8972 candidates)
9.
Express condition (8514 candidates) 
10.
Dimensions and forms (7368 candidates) 
11.
Articles and so on (5502 candidates)
12.
Examinations and instructions (4827 candidates) 
13.
Light and verbs (2293 candidates) 


