30. The world is ______ seven continents and four oceans.
—I can’t repair these until tomorrow, I’m afraid. —That’s OK, there’s ______.
All her time ________ experiments, she has no time for films.
It was quite a serious accident, ________caused by careless driving.
It was quite a long time ________ I made it out what had happened.
—Bruce was killed in a traffic accident.—________ I talked with him yesterday morning!