Our son doesn't know what to ___ at the University; he can't make up his mind about his future.
A. take in    B. take up    C. take over   D. take after

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I chose C~~

oh，my God
I type the wrong letter。。。。。it is B
"take up" is an important phrase with many usages
Thank Tony for providing so much useful information!!

b？

b

A

take up 有从事某事的意思，我选B

That's all right. It is my pleasure to share useful phrases with every one here.

I have to take B as the answer
You know , B is a correct answer.

c