[ 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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must/shouldModal SpeculationGrammar : Structural Common ErrorsPast simple regular verbsPrepositions of Place & TimeAnalogyAsking for and Giving OpinionAdjectives and PronounsDemonstrative SpeechOther quiz:
Prepositions of Movement › ViewEvery new day begins with possibilities. It’s up to us to fill it with the things that move us ____ progress and peace.
A. before
B. below
C. against
D. toward
Grammar › View
Luc has been watching TV […] two hours.
A. since
B. for
C. during
D. while