Ranked by: number of candidates
1.
Like / as / unlike (49260 candidates) 
2.
So / Neither (39834 candidates) 
3.
How and questions (38835 candidates)
4.
Quantity and measurement (26468 candidates) 

5.
Plural of words with -Y (17699 candidates)
6.
Sometimes, Some time, Sometime (11971 candidates)
7.
No/None .... (10197 candidates) 
8.
Talk/Speak/Chat/Discuss (8935 candidates)
9.
Express condition (8479 candidates) 
10.
Dimensions and forms (7295 candidates) 
11.
Articles and so on (5428 candidates)
12.
Examinations and instructions (4823 candidates) 
13.
Light and verbs (2284 candidates) 


