(2012·浙江高考)No matter how bright a talker you are, there are times when it's better ________ silent.
A．remain B．be remaining
C．having remained D．to remain
(2013·福建高考)________basic firstaid techniques will help you respond quickly to emergencies.
A．Known B．Having known
C．Knowing D．Being known
(2012·陕西高考)If he takes on this work, he will have no choice but ________ an even greater challenge.
A．meets B．meeting
C．meet D．to meet
(2013·江苏高考)Shortly after suffering from a massive earthquake and ________ to ruins, the city took on a new look.
A．reducing B．reduced
C．being reduced D．having reduced
(2011·湖南高考)The ability ________ an idea is as important as the idea itself.
A．expressing B．expressed
C．to express D．to be expressed
(2013·北京高考)Volunteering gives you a chance ________ lives, including your own.
A．change B．changing
C．changed D．to change
