concentrate
[ˈkɒnsəntreɪt]transitive verb Konjugation
concentrare
concentrate
[ˈkɒnsəntreɪt]intransitive verb Konjugation
to concentrate (on sthg) concentrarsi (su qc)
Complétez la séquence avec la proposition qui convient.
I liked … of the books. They were boring.