LiuJialing won ___ Best

— Hello, I ____ to ask if I can book two tickets for tonight’s film.— Sorry, we’ve already sold out.[ ]

________ he found the idea interesting, it was too difficult to be of practical use

Sometimes,________ we show our gratitude for a person is reflected in the kind of food we serve him or her

I had a hard time _________ where the postoffice is.