He ______ to escape from the prison, but he couldn’t find anybody to help him.
They usually have the medicine_______ before putting into the market all over the country.
---Where is your new home now? ---In the new developed zone. But I _____ downtown for five years.
—Hi, Mr.Brown! May I pick a flower in the park? —_______.
This problem is said _______ three times, but he still can’t understand it.
---I heard that you made a bicycle trip to the 2010 World Expo of Shanghai alone. ---No. Actually, my friend Bob ________ me.