Thomas Alva Edison didn’t “invent” the light bulb (灯泡), but rather he ______ a 50 –year –old idea, which is not well –known.
. .I really don’t know______I had my money stolen.
. What a pity! I missed meeting my boss at the airport because my car was ______ in the traffic jam.
. Along with the letter was his promise ______ he would visit me this coming Christmas.
. It is unbelievable that a well- behaved gentleman ______ be so rude to a lady.
. --- It was a pity that you missed the famous star yesterday. --- ______ I hadn’t returned to my hometown.