There are many people who have a          like yours, but they don’t believe they have the power to do anything to improve our environment.

Late again! What’s your ______ this time? 

It even leaves the scientists in _______what they should call the newly born creature, which looks half-human and half-animal.

When a space shuttle has accomplished its _____, it can be ready for another trip in about two weeks.

Mr. Li has ordered ___ for the school lab.