All tests by jandark with the online test builder (7 tests)
1. Pretérito perfecto compuesto (3502 candidates) 
2. Imperfect or Present tense (2547 candidates)
3. Ser or Estar (1561 candidates)
4. También / tampoco (4857 candidates)
5. Comparison words: más ,menos ,mayor ,menor ,mejor, peor (12161 candidates) 
6. Since, for, while, during, ago (3347 candidates) 
7. For, since, while, during (8066 candidates)
1.
Pretérito perfecto compuesto (3502 candidates) 2.
Imperfect or Present tense (2547 candidates) 3.
Ser or Estar (1561 candidates) 4.
También / tampoco (4857 candidates) 5.
Comparison words: más ,menos ,mayor ,menor ,mejor, peor (12161 candidates) 6.
Since, for, while, during, ago (3347 candidates) 7.
For, since, while, during (8066 candidates) 