Peter ________ at this job since he graduated from college.
Most of the educators are ________ providing more freedom to the teenagers, believing that it may make them more creative and independent.
None of us expected the chairman to ______at the party. We thought he was still in hospital.
In taking a space walk, Chinese astronauts are__________ going where Russian andAmericans went decades before.
The analysis shows that plastics, particularly those that __________ fast, are contributing to the climate change.
--- Is this company ______ your elder sister once worked in?---- Yes, it is.