根据首字母或汉语提示完成单词 。

1. They just have a ________ (空闲的) room for the guest.

2.Look, there is an ___________ (巨大的)animal on the top of the mountain.

3.There are so many birds flying above the r_________ of the houses.

4.The old man collect waste paper and bottles for r__________.

5.The workers are all ___________ (反对)the boss's idea strongly.