IV, Complete these sentences using an appropriate modal construction with the verbs in brackets:
1, If he had been doing his job properly, he really (review) ........................... the situation more than once a year.
2, Survivors felt there (be) ........................... an investigation last year into the cause of the disaster.
3, His annual income is reported (grow) ........................... rapidly over the last few years.
4, Only after they (watch) ........................... the documentary, did they contribute to the Save the Wolves fund.
5, We owe it to future generations (ensure) ........................... we spend enough tax money on green energy alternatives.