Verb agreement

Choose the correct answer for each blank.

1 - Of these papers, less than a half ____ with this issue.



2 - A number of the authors ____ claimed that x=y.



3 - The number of publications per year ____ reported in Table 3.



4 - The majority of articles only ____ marginal issues.



5 - This group of tables ____ all the relevant results.



6 - A variety of articles ____ investigated this business sector.



7 - Several thousand dollars ____ required.



8 - People ____ stranger than animals.



9 - The police ____ present in heavy numbers.



10 - Fifty per cent ____ certainly a good rate.