One sunny day, Alice sat ______a river with her sister.
More and more people found _________ necessary to have a balanced diet.
-- What do you think of the song “My Heart Will Go On ”? -- It __________wonderful. I like it.
-- Jim, I’m going to the Great Wall next week. -- ___________.
-- Lucy, when did you plant trees, last Saturday or Sunday ? --_________. We did it last Friday.
Tom often goes to the beach on vacation, _________?