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