Seen from space, the earth looks like a blue ball, with ______ 75% of its surface covered with water[ ]

enly everyone stopped t_____. But, for a while, I didn’t knowwhat it was.

Jack offered us a big meal when he was leaving the office, but our work ____, we refused it

So many directors ________, the board meeting had to be put off.

How unhappy your roommate looks!—Yes, but he’s not willing to tell me what it is _______ is troubling him.