[ Dependent Preposition ]
The scientist based his findings ____ years of research.
A. on
B. at
C. in
D. for

Random Topics:
Sentence CompletionPhrase or ClauseActive & PassivePast Simple or Past ContinuousPresent Perfect Simple & Present Perfect ContinuousTenses of Verbs - UsageGrammar AssessmentTransitive or Intransitive VerbsSimple Past/Past ProgressiveModals, Infinitives and GerundsOther quiz:
Grammar › ViewWhich of the following is an example of an uncountable noun?
A. Eggs
B. Apples
C. Dogs
D. Money
Modal Verbs › View
She probably buys this house next week.
A. She doesn’t have to buy this house next week.
B. She may buy this house next week.
C. She should buy this house next week.
D. She must buy this house next week.
Word Form & Verb Tense › ViewOne of the most _____ ways to keep your mind stress-free and healthy is meditation
A. effectively
B. effect
C. effective
D. effects
Tenses › View
By lunchtime, I ……….a text message to a friend
A. had send
B. had sent
C. have sent
