(2013·皖南八校模拟)The band was very successful in the seventies, most of　　　members were in their twenties. 

_______ I accept that he is not perfect, I do actually like the person.

We need some more facts and figures __________ we take the final decision.

—I wonder whether the speaker has arrived.— ________ ，I’ll check at the reception desk.

Though he had been trained for three months,       he didn’t pass the exam.