______more countries can use natural energy in the future remains to be seen.

admin2015-06-10 30

问题 ______more countries can use natural energy in the future remains to be seen.

选项 A、Whether
B、This
C、Who
D、If

答案A

解析

转载请注明原文地址:https://kaotiyun.com/show/x4gc777K

英语

相关试题推荐

随机试题

最新回复(0)