参考答案：
Lesson 104
A
1 He was too busy.
2 It was too cold for me to go out.
3 They were very easy.
4 Is that suitcase light enough for you to carry?
5 Is your brother old enough to be a member of our association?
6 They were too young.
B
1 Yes, he could. It was cheap enough for him to buy.
2 No, he couldn't. It was too expensive for him to buy.
3 Yes, they could. They were fresh enough for them to eat.
4 No, they couldn't. They were too stale for them to eat.
5 Yes, they could. It was loud enough for them to hear.
6 No, they couldn't. It was too low for them to hear.
7 Yes, he could. It was low enough for him to climb.
8 No, he couldn't. It was too high for him to climb.
9 Yes, she could. It was soft enough for her to eat.
10 No, she couldn't. It was too hard for her to eat.
11 Yes, she could. It was sweet enough for her to eat.
12 No, she couldn't. It was too sour for her to eat.
