Let's do some f_____.Then let's play basketball.请问这里填什么单词呢?

Let's do some f_____.Then let's play basketball.请问这里填什么单词呢?
Let's do some f_____.Then let's play basketball.请问这里填什么单词呢?

Let's do some f_____.Then let's play basketball.请问这里填什么单词呢?
应该是 Let's do some exercises first,then play the basketball 吧