She became a Japanese teacher for five years.=This cake ( )( )a Japanese teacher for five years.

问题描述:

She became a Japanese teacher for five years.=This cake ( )( )a Japanese teacher for five years.
She became a Japanese teacher for five years.
This cake ( )( )a Japanese teacher for five years.

She became a Japanese teacher for five years.
She ( has )( been )a Japanese teacher for five years.