Alice is famous ________ her paintings.
—Hello, may I speak to Mr Green , please? —Sorry. He ________ a meeting. Can you call him later?
I can't find ________ beef in the fridge. Shall I buy some?
Mark Twain ______ school and began to work at the age of twelve.
Jack usually goes to school by bike, ________ today he walked to school.
My English teacher ________ Mrs Lane now. She often helps me.