[ 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

Random Topics:
Simple and Compound SentencesGrammar: Used to, Would, Be used to, Get used toAdverbs of frequencyGrammar-Present Continuous-Sentence MakingPoetryFuture Simple TensesFormal & Informal WordsPersonal PronounsCoherent Sentence with Correct Grammar StructureNouns and QuantifiersOther quiz:
First Conditional › ViewIf ______________ to Paris, she will visit the Eiffel Tower.
A. Ann travels
B. Ann will travel
C. Ann travel
Grammar and Vocabulary › View
A few days later, she wanted to ……………. of her sadness, so she went out with friends.
A. break up
B. break out
C. break off
D. break down
E. break in
Grammar › ViewHe was in ENgland a week ago, but he _____ there before.
A. was never
B. hasn’t never been
C. won’t be
D. had never been
Vocabulary and Grammar › View
Martin _________ early this morning
A. didn’t get up
B. didn’t got up
C. did gets up
