We should be strict _______ ourselves______ our work.

Did you see who killed the little girl? —No, so quickly ___ that I couldn’t get a good look at his face. [ ]

You have to explain ____ us the reason _____ your being absent from school yesterday

If it ______ too much trouble, I’d love a cup of coffee

－How was your tripto the Maldives－I’ve neverhad one before