_____, I would like to thank Professor Osterhaus for offering me the chance to do this study, and for all the support throughout the study period. [ ]

famous public figure, you have a duty to ____ yourself responsibly, especially in public places.

Did you enjoy the party yesterday–-________, so I left early.

Lucy with Lily _____ good at Maths. We often help them ___their Maths.

Mr. Li lent me a book last week, _____I have learned a lot about earthquakes.