Write the correct relative pronoun (who, which, that, whose, where) to complete the following sentence:

The solution might be a marker vaccine ___ triggers the production of a slightly different set of antibodies to those induced by the wild virus.

Write the correct relative pronoun (who, which, that, whose, where) to complete the following sentence:

Young people ___ are not in employment or education in Britain are a public health time bomb waiting to explode, according to the WHO.

Write the correct relative pronoun (who, which, that, whose, where) to complete the following sentence:

The one industry category ___ age bias doesn't exist is elder care.

Write the correct relative pronoun (who, which, that, whose, where) to complete the following sentence:

Many children are being brought up only by mothers ___ partners have left in the early stages of the pregnancy.

Write the correct relative pronoun (who, which, that, whose, where) to complete the following sentence:

Older workers, ___ are less efficient at networking and using social media, have a harder time finding work.

Write the correct relative pronoun (who, which, that, whose, where) to complete the following sentence:

If a spinal disk ruptures and presses on nerve roots, the pain ___ radiates from the back and down the legs can be excruciating and disabling.

Write the correct relative pronoun (who, which, that, whose, where) to complete the following sentence:

Dory Brinker, ___ lives in Brewster, Mass., has decided to go to the Cape Cod Community College to study alcohol and drug abuse counseling.

Write the correct relative pronoun (who, which, that, whose, where) to complete the following sentence:

The number of working single mothers rises to 71%, ___ is the also the national average for mothers in relationships.

Write the correct relative pronoun (who, which, that, whose, where) to complete the following sentence:

For older Americans, jobs don't just fall into their laps. They have to pound the pavement, or today's equivalent, ___ is sending out loads and loads of résumés.