______ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.
Parents are doing all they ________ to help their children achieve their ambitions.
________ for the fact that she broke her leg, she might have passed the exam.
His pale face suggested he ________ angry and I suggested that he ________ at once.
I ________ sooner but I didn't know that they were waiting for me.
According to the rules and regulations, all payments ________ be made in cash in the shopping center.