Several times he almost brought himself to the point of speaking to them but his courage ________ him.
A. slipped B. escaped C. failed D. lost
We have strong ________ for believing that the newly-invented material is not only popular but also a monument to the eco-friendly lifestyle.
A. grounds B. reasons C. causes D. purposes
A firm from New Zealand has revealed a set of robotic legs which they claim will soon allow ________ wheelchair-bound people to walk again.
A. extremely B. previously C. actually D. eventually
Although the situation was tough during the economic crisis now things are beginning to ________.
A. look up B. keep up C. set up D. build up
Michelle Obama wears clothes that anyone can buy in a mall and ________ she may have a larger effect on consumers than ordinary models.
A. furthermore B. otherwise C. nevertheless D. therefore
Many people may be surprised by the number of chemicals that they are ________ to through everyday household products.
A. devoted B. addicted C. exposed D. applied
