After being.discovered by Dutch explorers in 1606,the eastern half of Australia_____by the British in 1770.
The work calls for great care and patience, so you ______ to do it.
______ he is doing an operation on a patient; please don’t disturb him.
There has to ______ a well-developed system that can give people a warning when a tsunami is ______ the way.
—I hear Johnson ______ in the middle school.—What? I can’t imagine him ______ as a teacher.
He has passed the examination _____ his hard work.