He started to learn English in 1990 and in the years ________ he kept on using it in his work.
I am pleased ______to the party ------it was so fantastic!
I couldn’t help ______if the bus was late.
Don’t respond to any e-mails ______personal information, no matter ______ official they are.
She may have missed the train, ______ she won’t arrive for another hour.
There are more opportunities for disabled people to make______ contribution to______ society.