My mother often tells me not to ________ or not to look down upon others.
---Could you tell me ______?--- By searching the Internet.
--- I really don’t know how ________ this problem.--- Let me see.
--- Excuse me, when and where will the next Olympic Games take place?--- The 31st Olympic Games _______ in Rio de Janeiro, the capital of Brazil in 2016.
---Look! Such heavy traffic!--- I doubt _________ or not I can get to school on time.
--- Our school is so beautiful.--- Yes. So our teachers ______ at school to enjoy its beauty.