一类负荷
参考答案：凡因突然中断供电造成人身伤亡事故或重大设备损坏，给国民经济造成重大损失，在政治上产生不良影响的负荷。
When you finish _____ your homework, you may watch TV. [ ]
A. do
B. to do
C. doing
D. does
—Let's go fishing if it this weekend.
—But nobody knows if it .
A．is fine; will rain
B．will be fine; rains
C．will be fine; will rain
D．is fine; rains
