He is a financial manager in Wall Street now, but nobody knows he ________ part-time jobs here and there for survival for eight years

He knew the problem was serious and promised to look into it _____ he reached office

Mr.Morse，who graduated from a famous medical university，spent years ______ his skills as a doctor.

Those successful deaf dancers think that dancing is an activity ____ sight matters more than hearing[ ]

You____ part in the party on time.— Sorry, I was delayed by the accident.