【练习】用括号内所提供词的适当形式填空
1） This book demanded all your_________.(concentrate)
2） My parents didn’t _________ of my leaving school this year and I had to accept their ________.(approve)
3） We need enough _________ engineers to undertake the job.(profession)
4） his _______ was proved beyond all doubt by the prosecution and he felt _____ about not telling the truth to the judge (guilt)
