I hate _____ when people talk with their mouths full.

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

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

 ______ is necessary for everyone to obey the traffic rules.

When Kerry and Sam met again two years later, each was pleased to see ________.