He heard an unusual noise from the tire and guessed that the brakes needed________ .
A、adjusted
B、be adjusted
C、to adjust
D、adjusting
【正确答案】：D
【题目解析】：need doing的意思是“需要被做”，有被动的意思。所以need doing = need to be done。例如：I need to wash my clothes. 意思是My clothes need washing. 原句的意思是“他听到轮胎处有奇怪的声音，他猜可能是刹车需要修理。”因此我们选择D. adjusting
