______ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.
She was disappointed that most of the guests ___when he ___ at the party.
As a graducate in computer science, he ___ to work out the problem.
I don't think ___ possible to master a foreign language without much memory work.
If you want to borrow a football after school, your student card ___ here.
You ___ me, but since you have,I’ll keep it secret from others.