I had meant to meet you at the airport this morning but I was too busy for I_______ a report.

Don't shout at the old man.They should ____.

---- Is there anything about your high school life you wish you’d done differently? ---- I regret that I ______ earlier what I really like doing.

George once told me that he would visit our house，but，for various reasons，he________so far.

We must work hard to      a good knowledge of English.