[ Grammar ]
In chemical terms radium ______ little from barium.
A. is different
B. differs
C. differed
D. is differing

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Degrees of AdjectivesConditional Sentence Type 2 and Type 3COUNT - NONCOUNT NOUNSPast ParticiplesSubordinate Conjunctions-ing &-ed AdjectivesReporting VerbsUse of Prepositions or ConjunctionsAsking & Giving OpinionPast Perfect & Past SimpleOther quiz:
Daily Routines & Tenses › ViewWhich sentence is correct?
A. She wakes up at 7 AM every day.
B. She wakes up at 7 AM every day.
C. She is waking up at 7 AM every day.
D. She wakes up at 7 AM every day.
Tenses › View
I __________ my homework before you told me to do it
A. did
B. have done
C. had done