All tests by jandark with the online test builder (7 tests)
1. Pretérito perfecto compuesto (3171 candidates) 
2. Imperfect or Present tense (2373 candidates)
3. Ser or Estar (1552 candidates)
4. También / tampoco (4561 candidates)
5. Comparison words: más ,menos ,mayor ,menor ,mejor, peor (11412 candidates) 
6. Since, for, while, during, ago (3269 candidates) 
7. For, since, while, during (7914 candidates)
1.
Pretérito perfecto compuesto (3171 candidates) 2.
Imperfect or Present tense (2373 candidates) 3.
Ser or Estar (1552 candidates) 4.
También / tampoco (4561 candidates) 5.
Comparison words: más ,menos ,mayor ,menor ,mejor, peor (11412 candidates) 6.
Since, for, while, during, ago (3269 candidates) 7.
For, since, while, during (7914 candidates) 