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,

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Themathteachergaveussomeexercisesandaskedus___.AtoworkthemonBtoworkonthem选择哪一个说明原因,Themathteachergav

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,
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,

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,
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/off...
get on/off/down/.
hold back/down...
look up.
2.由动词+介词
look after/over/for...
take on/after.
get over/into...
put into...3而本题on 是作介词,所以them 放后面,选b

B

to finish then

B
数学老师给了我们一些练习并让我们做。