( )(5) Lucy works ____ CCTV. A. in B. at C. on
( )My mum is ______ to say goodbye. A. waving B. wave C. waves
( ).It ______ to snow. A. start B. starting C. starts
( )More _____ come in . A. friend B. friends C. student
( )I am _____ in the sky. A. fly B. flys C. flying
( )I am having _____ ice cream. A.a B. an C./