[ Grammar ]
Then I ______ that there should be in the minerals some unknown element having a much greater radioactivity than uranium or thorium.
A. am thinking
B. think
C. had thought
D. thought
Select your answer:

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Sentence Structure and Verb Tenses › ViewIdentify the sentence with correct punctuation for dialogue:
A. “What time is it”, he asked.
B. She whispered, “Be quiet.”
C. “Where is the library?” She asked.
D. I can’t believe it she said!
Tenses and Articles › View
My uncle is _______ surgeon.
A. a
B. an
C. the
D. –
