UNIT 49I. PRONUNCIATION

27. - 3500 CAU TRAC NGHIEM ON TAP AV THCS
3500 CAU TRAC NGHIEM ON TAP AV THCS

27. When she was a girl, she used to ... swimming but now she is used

to ... tennis.

a. going / play

b. go / playing

c. playing / going

d. go / play

 b