VFP程序控制语句："DOWHILE条件命令组ENDDO"属于（）。

A.顺序语句

B.预知循环次数的循环语句

C.条件语句

D.选择语句

E.未知循环次数的循环语句

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