Answers to Black Holes

Exercise A

1 black holes are more mysterious than many other objects in the universe

2 The gravity in a black hole is larger than that in anything else

3 that spins faster than anything else nearby

4 that is far heavier than the sun

Exercise B

1 is a lot larger than

2 works more efficiently than

3 was much farther than

4 seems more complicated than

Exercise A

2 Lung cancer is believed to have a lot to do with smoking.

3 The company is reported to have lost money last year.

4 The ancients are said to have believed the earth was flat.

5 Half of the class are/is said to have failed geography last semester.

Exercise B

2 is believed to be the most successful coach

3 is reported to have led our school football team to clock up twenty wins

4 was said to have already known how to kick a ball

5 was even reported to be a future superstar

1 The Topic Sentence Sometimes it is a good idea to just say “No.”

j The volleyball game was coming up.

k My friends asked me to go to a party with them.

l I refused, but they understood why I made this choice.

2

Life isn’t always about saying “Yes” to everything. We have to think seriously about the consequences. If we promise someone to do something, we should keep the promise; otherwise, we will lose credibility. In reality, sometimes saying “No” is a wise decision.

I can remember one time that I said “no” to my friends. A school volleyball game was approaching, and we had to practice every weekend. But one weekend, my friends asked me to go to a party with them. It was an afternoon party, and going to it would have meant missing volleyball practice. It was a hard decision to make, but in the end, I said “no” to my friends, and told them I had to practice volleyball that day. I was surprised that they didn’t get angry. Instead, they completely supported my choice.

Through this experience, I learn it is not rude to say “no” to others when it is necessary. Sometimes, it is the right thing to do.