Words that complete sentences conform with the sentential context. Hence, the words that best complete the above sentences are given below.
1. Using the spelling word to best complete the sentence.
Use your microscope to view the tiny cells.
2. Using the spelling word to best complete the sentence.
He forgot his racquet when he went to play in the tennis tournament.
3. Use the spelling word that best completes the sentence.
The children were suffering from atrocities.
Therefore, the words that best complete the gaps above are microscope, racquet and atrocities.
learn more about vocabulary from here: https://brainly.com/question/25567167