Fill in: a/an, the or– . 1 .... experiment can help a researcher prove their theory 2...

Question

Fill in: a/an, the or– . 1 .... experiment can help a researcher prove their theory 2 ............ antibodies exist in our blood. 3 The project gives free medical care to ......... poor. 4 ............ lab is where scientists conduct experiments. 5 ...... knowledge is the foundation on which science was built.

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Answer 1

1. AN experiment can help a researcher prove their theory.

2. Antibodies exist in our blood.

3 The project gives free medical care to THE poor.

4. A lab is where scientists conduct experiments.

5. Knowledge is the foundation on which science was built.​