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Grammar for TOEFL › ViewKepler’s Laws, principles outlining planetary movement, was formulated based on observations made without a telescope.
A. was
B. formulated
C. based
D. made
Grammar and Vocabulary › View
What is the correct past form of the verb in parentheses? “After school, Lisa __________ her books in the library.” (leave)
A. leaving
B. left
C. leave
D. leaves