Many people like to talk about generation gaps. I don't think there is  ________       in my family though.

It rained heavily this morning, but _______ of my classmates were away from school.

----- Have you finished all of the exercises?---- Yes, completely. _____is left. 

We feel         our duty to make our country a better place.

whatever great achievements the future may have in store for China, ______ is likely that many of them will be born in Zhongguancun.