We need to think outside of box _____ we are to come up with something really new.

Mr. Wu teaches English. We all like very much.

Why didn’t you go to the cinemayesterday — I ____， but my wife returned from France the moment I wasleaving

The little boy is dirty from head to foot because he ______ in the mud all morning

Mr. Park, I know I am late, but please allow me to explain it to you, ________？