家庭电路中接有额定电流为5A的保险丝，在这个电路里允许接的用电器的总功率不能大于______kW．现已经装了40W的电灯5盏，正常使用800W的电热器一只，最多还可以接入______盏60W的电灯．

The good-for-nothing graduate's mind _______ when he learned that he could not get the graduation

diploma because of his poor performance. [ ]

A. turned empty

B. became hollow

C. grew blind    

D. went blank