In 1947 a pilot saw________UFO flying in________sky.

In 1947 a pilot saw________UFO flying in________sky. A: a; the B: an; the C: a; / D: an; /

In 1947 a pilot saw________UFO flying in________sky. A: a; the B: an; the C: a; / D: an; /

In 1947 a pilot saw________UFO flying in________sky. A: a; the B: an; the C: a; / D: an; /

In 1947 a pilot saw________UFO flying in________sky. A: a; the B: an; the C: a; / D: an; /

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.

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

The ancient people believed that ______. A: the earth was spinning on the axis of the sky B: the sky was a hollow sphere spinning around the earth C: the patterns of stars on the sky would never change D: the stars around the sky were not stationary

We can infer from the passage that there were some women scientists ______. A: on board Sky Lab before 1962 B: on board Sky Lab before 1965 C: on board Sky Lab after 1962 D: on board Sky Lab after 1965

The sky 「 」blue. (appear)