外研版英语(刘兆义主编)四年级下册 Unit 6 Holidays 课时练习一、单选题1.Liu Lei is ______ China.( ) A. on B. from C. to2.She _______ drawing. ( ) A. am B. are C. is3.I _______ singing. ( ) A. am B. are C. is4.We _______ doing homework. ( ) A. am B. are C. is5.We're on holida...