Question

My son ______spend all his pocket money, but now he ______saving some of it.

A．was used to…used to	B．used to…is used to
C．used to…used to	D．was used to…is used to

Answer 1

B

根據but now可知前文應為過去時態，used to可表示曾經做某事，be used to doing sth 習慣了做某事，故選B。