1.A. Complete each sentence by changing the verb in the parentheses to its past form.
1. The 1918 influenza pandemic (be)
the most severe pandemic before COVID-19.
2. The influenza pandemic ofm1918-19, was also call)
Spanish flu.
3 It (last)
one and two years.
There was no universal consensus regarding where the virus (originate)
5. The Spanish flu pandemic of 1918 (infect) an estimated 500 million people worldwide
6. The pandemic (occur)
in three waves.
7. It was first (observe)
in Europe, the United States and parts of Asia.
8. At the time there (be)
no effective drugs or vaccines to treat this killer flu.
9. Citizens were (order)
to wear masks.
10. Schools, theatres and businesses were (shutter)