The forty-first Expo was held May 1st 2010 in Shanghai. A. in B. on C. at
The car is running ________ its lights ________.
—When are you going to get your ears ________? —I am going to have Ms Li ________ my ears this weekend.
—Mary was heard ________ just now. What happened? —John was telling a joke.
Our school ________ in the last five years.
Only by studying hard ________ improve her English soon.