根据下列句子结构和所给汉语的意思，写出这一单词的正确形式。（共5小题；每小题2分，满分10分）
Do you know what’s his ________(态度) to this matter?
The girl was so glad to receive an _______ (请帖)from her friend.
The house was old and the tables were______（布满了灰尘）.
He speaks with a strong southern ______（口音）.
English is spoken as an _____（官方的）language in Australia.