23. In order to ________ a good knowledge of English, he gave up his job and went to study in an English school.
A. require B. inquire C. acquire D. address
24. ---Does Lucy enjoy singing?
---Yes, she does. I have never seen anyone else that is as ________ about singing as she is.
A. worried B. cautious C. enthusiastic D. responsible
25. His father insisted on punishing him, but he insisted he had _______ to do with the matter.
A. something B. a lot C. nothing D. anything
