what shall we do if we use up the energy in the world的同义句what ---_英语解答

what shall we do if we use up the energy in the world的同义句
what ------- the energy in the world -------- -------?

人气：188 ℃　时间：2020-03-31 11:57:25

解答

what --if----- the energy in the world ----runs---- ----out---?
我查字典了,what if 也有如果……该怎么办的意思