[ Vocabulary ]
___________ is an investigation in which all of the conditions are controlled.
A. control
B. experiment
C. scientific method
D. variable
Select your answer:
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Grammar › ViewChoose the correct word to complete this PAST SIMPLE sentence: “What movies did you … to watch as a kid?”
A. Use
B. Used
C. Uses
D. Using
Prepositions › View
The percentage ___ people living below the poverty line has decreased ___ 25% ___ 15%.
A. of; from; to
B. at; with; between
C. at; from; with
D. to; of; for