—Walkingandridingaregoodforhealth.—

问题详情：

 —Walking and riding are good for health.

— ______ and _______.

A. So are they; so is swimming         B. So are they; so swimming is

C. So they are ; so is swimming       D. So they are; so swimming is

【回答】

C

知识点：倒装与省略

题型：选择题