轮盘（头冠）
参考答案：
轮虫身体前端扩大呈盘状，其上面生有一定排列的纤毛。
——How is your grandma?
——She’s fine. She used to_____TV at home after supper. But now she is used to_____out for a walk.
A．watch;go
B．watching;go
C．watching;going
D．watch;going
