---Why was Mr. Li so happy this morning?---Because he was with an award for excellence in teaching.
When asked the reason for moving to the USA, he said, “Soccer is huge around the world apart from America, so that’s_________ I want to make a difference.”
Mr. Smith is ________ a good professor ________ all of us students respect.
“I’d like to give my thanks to those _________ help my son will be able to survive his terrible disease,” said the mother on TV.
Whether you believe it or not, it is _________ that causes your illness.
Such crimes may be so complex that months or years go by before anyone______ them.