Prior to the formation of a tornado,_________.
A: the sky is cloudy
B: the sky is very dark
C: the sky is cloudless
D: a black line stretches across the horizon
A: the sky is cloudy
B: the sky is very dark
C: the sky is cloudless
D: a black line stretches across the horizon
举一反三
- Lighting the dark sky for a few seconds.
- There are some clouds in the sky, it's ______ today. A: ainy B: windy C: cloudy
- Given the following scripts， what output would be generated？（） A: The sky is red. B: The sky is blue. C: The sky is green. D: The sky is yellow.
- Great! There are no clouds in the sky, it is ______ today! A: cloudy B: sunny C: rainy D: foggy
- ______ there are black clouds in the sky, it may rain. A: After B: For C: Since D: Because