He threw away his cup and became even happier. Which of the following is correct for the underlined word in the sentence?
— Nick, would you mind out of the bathroom? — Sorry. I won't be long. A. come B. to come C. coming
-- does your cousin go to the gym? -- Twice a week. A. How long B. How often C. How soon
-- Is that girl Susan? -- It ______ be her. She left for Beijing yesterday. A. needn't B. can't C. mustn't
— Mum, where are my socks? — Under your bed. You should your things. A. put on B. put down C. put away
— Did you go to the exhibition on May 18th? — Of course. There were many kinds of Taiwan fruits ______. A. on show B. on duty C. on business