My father __________ smoke a lot but now he has given it up.

A．used to     B．was used to      C．got used to       D．was used for

My father ________ a lot, but now he has given it up.

A. used smoke

B. is used to smoking

C. was used to smoke

D. used to smoke

I’m so happy that my father has given up ________.

A．smoke                                B．smoked

C．to smoke                              D．smoking