These boxes ______ for keeping the food clean and cool.
---Has he returned from Canada_________?--- Yes, he’s _________ come back.
--Where is Mr. Smith? ---He ___ Guangzhou. He ____ there for a week.
My grandpa _____ in the city , but now he______ the life in the country.
---What do you think of _____ show in Ocean Park?---I should say it was _____ great success.
--Hi , Lily . How was your trip to Hongkong ?-- ________, We had a good time there.