I hate people _______ laugh at others when they are in trouble.

I think this bike belongs ____ our teacher.

Would you like to come to the party here on Saturday? — I’d love to, but my father insisted that I _____ to see my grandparents at the weekend.[ ]

ecial thanks go to thousands of volunteers,without ________tireless work, none of this would be possible．

Barack Obama delivered a speech to 500 local youths during his visit to China, many of _______ were from Fudan University and Tongji University