问题补充：
19. At that time, peopleearly in the morning in winter, and coal them warm.
A. used to get up; used to keep
B. were used to getting up; was used to keep
C. used to get up; was used to keeping
D. were used to get up; was used to keep
答案：
A. used to get up; used to keep
(答案→)B. were used to getting up; was used to keep
C. used to get up; was used to keeping
D. were used to get up; was used to keep
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