All tests by jandark with the online test builder (7 tests)
1. Pretérito perfecto compuesto (3312 candidates) 
2. Imperfect or Present tense (2397 candidates)
3. Ser or Estar (1552 candidates)
4. También / tampoco (4618 candidates)
5. Comparison words: más ,menos ,mayor ,menor ,mejor, peor (11537 candidates) 
6. Since, for, while, during, ago (3281 candidates) 
7. For, since, while, during (7944 candidates)
1.
Pretérito perfecto compuesto (3312 candidates) 2.
Imperfect or Present tense (2397 candidates) 3.
Ser or Estar (1552 candidates) 4.
También / tampoco (4618 candidates) 5.
Comparison words: más ,menos ,mayor ,menor ,mejor, peor (11537 candidates) 6.
Since, for, while, during, ago (3281 candidates) 7.
For, since, while, during (7944 candidates) 