A. What struck him B. therefore C. broke out
Phrases:
A. the plague【T1】 1in southern England
B.【T2】 2was the conjecture that the same force of gravity
C. Newton【T3】 3spent the next eighteen months at home
In the year 1665, when Newton was twenty-two,【T4】 4, and the University of Cambridge was closed.【T5】 5, removed from traditional learning, at a time when he was inpatient for knowledge and, in his own phrase, "I was in the prime of my age for invention. " In this eager, boyish mood, sitting one day in the garden of his widowed mother, he saw an apple fall.【T6】 6, which reaches to the top of the tree, might go on reaching out beyond the earth and its air, endlessly into space. Gravity might reach the moon: this was Newton's new thought: and it might be gravity which holds the moon in her orbit. 【T1】