施工网络图中的关键线路有几条
2．上述索赔要求是否正确就各事件分别说明，乙方向甲方提出的要求如何答复
3．该工程实际工期为多长

根据句意和首字母提示完成单词。

1. Sue has a great sports c________: balls, rackets and so on.

2.—Do you like math?

   —No, I think it is d________.

3.—Let's play soccer.

  —No, it's b________.

4. There are some tennis r________ on the floor.

5.—Let's play computer games.

   —OK.That sounds i________.