[ Grammar ]
Electron storage rings ___ in investigations of the structure of materials.
A. They are used
B. That are used
C. Used
D. Are used
Select your answer:
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Vocabulary › ViewSolace contrasts most with the word
A. relief
B. soothe
C. support
D. irritation
Vocabulary › View
3. They …………… soccer with their friends last night.
A. play
B. played
C. are played