根据句意和汉语注释，在答题卡标有题号的横线上，写出单词的正确形式。
Our guests __________ （称赞）the meal as the best they had had for years.
It’s__________(或许) the best movie I have ever seen.
It’s said that many _________（导演）telephone numbers are put on the Internet.
I am wondering which is _________(安全), traveling by train or by air.