—Let's see the penguins now. I like penguins.

—_____ ?

—They are very interesting.[ ]

A. What

B. How

C. Where

D. Why

货船应在（）内进行一次救生演习，若有（）船员未参加上一个月的演习，则应在离港后24小时内举行这样的演习。

A.一个月/20%

B.二个月/25%

C.一个月/25%

D.二个月/20%