Galileo and Newton established the scientific framework ———– others built new scientific laws on.
A. which
B. where
C. who
D. when

Random Topics:
Past Simple and Past ContinuousPast Simple VerbsThere is, There are, Some, AnyPhrase vs ClauseTenses, Determiners & Subject Verb AgreementPast and Perfect TensesModal Verb in Passive VoiceWh-QuestionClause Markers TOEFL GrammarPronouns and AdverbsOther quiz:
Tenses › ViewShe_______in the kirchen when her son bumped his head on the table.
A. cooked
B. cooks
C. is.cooking
D. was cooking
Grammar Modals › View
Match the first half to the correct second half of the sentence.
Wait! Don’t call the neighbor right now.
A. They must be finished by then.
B. They will have finished eating by then.
C. They might be eating dinner.
Grammar › ViewMy uncle ____ at Penang Airport from Singapore tomorrow afternoon
A. arrives
B. is arriving
C. will arrive
D. will be arriving
Modal Verb › View
A: Why is she still perspiring? She _______ too hot. I’ve taken her jumper off.
B: In that case, she _______ a fever. You’d better take her temperature.
A. can’t be / must have
B. isn’t / would rather have
C. wouldn’t be / is having
D. needn’t be / ought to have
