27.---Mary, you didn’t show up at the meeting last week? ---No, I________, but my son had a sudden fever and I had to stay at home to take care of him.
Out of the crowded bus______, who was dressed in a black suit and waved to a woman..
You can either have the double room or the family room,________ you want.
Last month, American scientists started working on _____ project aimed at improving _______ ability to predict earthquake.
-Does Bill do his new job well? -_______ his old job. I’m afraid there’s no hope for him.
It’s impossible for a person______ a sense of responsibility to succeed.