The star always goes_____ top of the tree.
() -- Happy birthday! -- ________ A.Happy birthday! B. Good-bye. C. Thank you.
( ) My sister is six. She is ________. oldB. young C. tall
( ) I live ________ Canada. A.inB. at C. on
( ) We ________ a happy family. A.am B. is C. are
( ) This is my father, my mother and ________. A.I B. me C. my