问题补充：
Only after a baby seal is pushed into the sea by its mother to swim.
A. how will it learn
B. will it learn how
C. it will learn how
D. and it learns how
答案：
A. how will it learn
(答案→)B. will it learn how
C. it will learn how
D. and it learns how
解析：以only开头的条件句，主句采用部分倒装，主句倒装，从句不倒装，故选B。
