[ Vocabulary ]
A method for collecting information by observing a phenomenon in action.
A. variability
B. observational study
C. quantitative data
D. categorical data

Random Topics:
Second and Third ConditionalPhrasal Verbs with up and downPrepotitionsConditionals and WishesPresent Simple and Present Continuous TenseAuxiliary Verbs, if, unless and ModalZero Conditional SentencePoetryPresent Simple vs Present ContinuousVocabulary & GrammarOther quiz:
Reported Speech › View‘I’ve been ill for a couple of weeks.’ ⇒ He told me he_______ for a couple of weeks.
A. is ill
B. was ill
C. had been ill
Vocabulary and Grammar › View
A synonym for dependable is _____.
A. reliable
B. generous
C. characteristic
D. selfish
Modals › ViewComplete the missing word. We _______ to protect the Galapagos Islands in order to save the giant tortoise.
A. must
B. will
C. have
D. can
Grammar › View
Every Saturday, Oscar likes ____ go skiing in the mountains. Allie likes skiing, ______.
A. too; to
B. two; to
C. to; too
D. too; two
