我的血型是B型，可以捐给B型和AB型的人。

My blood type is ___B, so I can donate to people with B or AB types.

我的法语水平现在是B1级。

My French is now at the ___B1 level.

医生建议我多吃富含维生素B1的食物，比如全麦面包。

The doctor advised me to eat more foods rich in ___B1, such as whole wheat bread.