my father __a lot.He has given up smoking now.a used to smoking b used to smoke c is used to smokD is used to smoking

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my father __a lot.He has given up smoking now.a used to smoking b used to smoke c is used to smokD is used to smoking

my father __a lot.He has given up smoking now.a used to smoking b used to smoke c is used to smokD is used to smoking
my father __a lot.He has given up smoking now.a used to smoking b used to smoke c is used to smok
D is used to smoking

my father __a lot.He has given up smoking now.a used to smoking b used to smoke c is used to smokD is used to smoking
B
used to do sth过去习惯做某事

B过去常常吸烟

选B used to do表过去常常干……