39. Rita wears a device around her wrist to ______ her heart rate so that she can monitor her
health conditions.
(A)track
(B)spoil
(C)involve
(D)consume
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統計: A(201), B(15), C(17), D(22), E(0) #2677632
統計: A(201), B(15), C(17), D(22), E(0) #2677632