句型转换

1. She often helps other children. (改为被动语态)

    Other children _____ _____ by her.

2. Harry Potter was written by J．K．Rowling. (改为一般疑问句)

     _____ Harry Potter _____ J .K. Rowling ?

3. Betty will be invited to the party this evening. (改为否定句)

    Betty _____ _____ _____ to the party this evening.

4. Some vegetables were bought at the morning market. (对画线部分提问)

    _____ _____ some vegetables _____?

5. He was so interested in the field of computer science that he couldn't stop his study. (改为同义句)

    He was _____ _____ in the field of computer science _____ _____ his study.

货币转化为资本的前提是( )。

A．货币在运动中发生了价值增值
B．货币投入流通的目的是为了带来剩余价值
C．货币所有者购买到劳动力商品
D．货币可以购买到生产资料