In the text below some words are missing. Select appropriate words to fill the gaps.

The majority of early pictures in the National Portrait Gallery’s care are by unknown artists, with (1) ……………………… questions, such as when, where and why they were (2) ………………. still remaining to be answered. Through the application of scientific methods, a new project has the potential to unlock (3) ………………… that will allow researchers to determine answers to these questions. They will use a (4) ………………. of cutting-edge scientific techniques, such as X-ray and infra-red reflectography in order to (5) …………………. new information about individual paintings.

(1) combination (2) linked (3) fundamental (4) prospect (5) evidence (6) painted (7) reveal (8) care

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