.The chief________of the year 2010 for   Shanghai will be the Expo.

She made a silly mistake because she hadn’t kept her       on her work.

He had been practicing his spoken English with the ____ of working as a volunteer for World Expo Shanghai and his dream finally came true.

Tom’s and John’s＿＿＿＿＿came to London last week．

 –What’s the matter, doctor? --Nothing serious. Take the medicine according to the ______.