一个不透明的盒子中装有除颜色外部相同的20个小球．从中每次摸出一个球，记下颜色，再放回，如此反复，经多次摸取后，发现摸出红色小球的频率大约为40%，则盒子中红球的个数应为____ 个．

根据句意及汉语提示完成单词

①There's a____（电脑）on the teacher's desk.

② What can you see in the____（图片）?

③ Is there a____（电视）in Lucy's room?

④There isn't any ____（家具）in the old house.

⑤The old man is ____（九十）years old.