文化文学常识不正确的一项（ ）

My grandpa learns English for two hours every day, _________ he is over70.— Really We should learn from him.

_______ was known to them that the boss had broken his promise______ he would give them a rise.

his first assignment at the office of a popular English newspaper.

You will _______ your health ifyou work so hard，eat a little food and sleep badly．