正常恶露持续的时间是 （）
A.产后24小时
B.产后3天
C.产后10天
D.产后4～6周
E.产后6周
参考答案：D
— How about your trip to the seaside?
— Great! I enjoyed ______ in the sea. [ ]
A. swimming
B. to swim
C. swim
D. swims
