题目内容：

The math teacher gave us some exercises and asked us ___.
A to work them on B to work on them选择哪一个 说明原因，

优质解答

一般来讲,由动词+副词所构成的短语动词,如代词it/them作它的宾语时,要把it/them放在其中间;由动词+介词所构成的动词短语,如it/them作它宾语时,要将其放在后面.1.由动词+副词put down/on/off/in...take out/up/down/o...

追问：

但我查词典 work on 怎么写的是动副短语呢