Complete the sentences with the correct form or tense of the verbs in brackets. `1.` By the end of 1999, the country's economy ................... (shrink) by 7 per cent, and the unemployment rate had increased drastically. `2.` The caregiver may report that the child ................... (shake) in an attempt to resuscitate it. `3.` Police said they have registered a case and an expert opinion ................... (seek) to find out the causes of the fire.