The letter____Tommy received from his company yesterday is very important.
___________ has always been expected, he has finally achieved his dream, ________ makes his parents so proud.
Safety in school has been of great concern because of frequent reports about accidents _______ students got injured or killed while in school .
Although advertisements enable _________ to make decisions quickly, they sometimes cause lots of trouble.
Would you like to play table tennis with us after school?–– _________.