.It's too late to go out now. ____ , it's starting to rain.
_____ the child to bed, she began to correct the pupil’s exercise.
____ with a difficult situation, Arnold decided to ask his boss for advice.
It was ______ back home after the experiment.
It was 1969___ the American astronauts succeeded in landing on the moon.
______ with the size of the whole earth, the biggest ocean does not seem big at all.