单词take的问题

enter in sth.
横线能加in,但在这里什么介词都不加是最好的.(可查牛津字典例句)
take it 在这里是:参加的意思。
整句意思是:我报名了考试，但是我不想考（参加）。

不需要加for。
take it的意思就是做。
整个句子的意思是我参加（报名）了考试，但我不想做。

take
vt.
1. 拿,取;握,抱
She took his outstretched hand.
她握住他伸出的手。
She took a piece of paper and began to write a letter.
她拿了一张纸,开始写起信来。
2. 拿走,取走;夺取,占领;抓,捕;吸引
The airport had been taken by daybreak.
天亮前机场就被攻占了。
3. 带去;带领[O][O1]
Dad took us to the museum last Friday.
上星期五爸爸带我们去博物馆。
4. 就(座),就(职)
5. 取得,获得
6. 接受;采取;修(学科),上(课)
I plan to take biochemistry this semester.
这学期我准备选修生物化学。
7. 承担;容纳;容忍[W]
8. 吃(饭),喝(水),服(药);吸入,吸收
People in this locality used to take two meals a day.
这儿的居民过去每天吃两餐饭。
9. 需要;花费;占用[O1]
The flight will take three hours.
路上要飞三小时。
10. (表示做一次动作)执行,做
We took a walk through the town after lunch.
吃完午饭我们在城里走了走。
He took a bath after work.
下班后他洗了个澡。
11. 生(根);产生