Английский язык, intermediate.

A) could be able to couldn't not being able to be able to couldn't be able to couldn't can being able to wouldn't be able to b) 2) couldn't remember 3) be able to 4) can 5) been able to 6) couldn't 7) being able to 8) can't 9) being able to 10) be able to 11) be able to 12) can't