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________.

门式起重机是桥架通过两侧支腿支撑（）轨道上或地基上的桥架型起重机。

A.地面

B.高架