It is very ______ that she will ring me tonight.

＿to my regret, I am unable to accept your warm invitation. 

 -Do you think an advertisement is a help when you look for a job? -Well, it depends. __, it give me a chance to try.

—You don’t seem to be quite yourself today. What’s wrong? —Oh, I’m suffering from a cold. Nothing serious, _____. 

We were all very much attracted by the beautiful scenery ______ we set foot in the village.