问题
选择题
Last year, I usually spent a lot of time ____my homework. And at the same time, I paid some money ____ my musical classes.
A．to do, for
B．doing, for
C．and do, on
D．with doing, on
答案
答案：B
spend +时间+doing sth或on sth，而pay ···for，表示为··付账。故选答案为B
