Mark said he ___________ me some drinks and snacks here.

Some people are worrying about the possibility ________ mobile phones could be responsible for a range of illnesses, from rashes(皮疹) to brain tumors．

Tom has to wear uniforms _____ gym class. [ ]

The girl ______ red plays the piano well. She is often invited to give performances by TV and radio stations.[ ]

My uncle is an experienced teacher. He_____English since 2002.