It’s reported that the new underground line has been completed．—Yes but it hasn’t been made clear _____it’s to be opened to traffic

____ we want to know is whether we must finish thework ____ you assigned last week

Have you watched the latest TV program Running Mat——Of course! It’s popular with__________the young________the old.

It didn’t _____ him that she would refusehis invitation

He really succeeded and he___his success to his hard work.