Work in pairs. Check the meaning of the words using a

Work in pairs. Check the meaning of the words using a dictionary. Complete the gaps with the words from the box. Change the form if necessary.
search for claim investigate challenge declare reject accept reveal confess
1 They ... to have мейд a new discovery.
2 Stephen was ... the winner.
3 He was frustrated because his colleagues ... his arguments.
4 Scientists are ... evidence.
5 The research aims to ... why the company is not doing better.
6 The survey ... that most residents are against the new project.
7 Sarah ... his explanation without question.
8 He later ... that he had been involved in the trick.
9 They are likely to ... the decision because it was made in a hurry.