All tests by jandark with the online test builder (7 tests)
1. Pretérito perfecto compuesto (3505 candidates) 
2. Imperfect or Present tense (2547 candidates)
3. Ser or Estar (1561 candidates)
4. También / tampoco (4859 candidates)
5. Comparison words: más ,menos ,mayor ,menor ,mejor, peor (12174 candidates) 
6. Since, for, while, during, ago (3349 candidates) 
7. For, since, while, during (8069 candidates)
1.
Pretérito perfecto compuesto (3505 candidates) 2.
Imperfect or Present tense (2547 candidates) 3.
Ser or Estar (1561 candidates) 4.
También / tampoco (4859 candidates) 5.
Comparison words: más ,menos ,mayor ,menor ,mejor, peor (12174 candidates) 6.
Since, for, while, during, ago (3349 candidates) 7.
For, since, while, during (8069 candidates) 