First _______ in 1926, the opera Turandot still attracts audience from all over the world.
My dictionary has disappeared. Who do you think ______ have taken it?
It doesn’t make ______to buy that expensive coat when these cheaper ones are just as good.
When she woke up, she realized that the things she had dreamt about could not ______ have happened.
— We ________ of gas. I’m afraid we can’t go much further.— I know there’s a gas station ahead. Will it last until we get there?
At times, he felt ____ difficult to _______ himself to getting up early.