问题
______is now no doubt ________ global warming is a security threat to us all.
A:It; that
B:There; that
C:There; whether
D:It; whether
B:There; that
C:There; whether
D:It; whether
正确答案是：
同类题型
________ Dongtai you see today is _______ different city from what it used to be.
Shandong lies _______ the east of China and Japan lies_______ the east of China,too.[ ]
How was the food?—It was ______ good.
We should stop people from_____ the street when the light is red.
They have to walk_________8 country parks and___________20 hills and mountains. [ ]