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Since 1994, the glacier in Antarctica has lowered by as much as 90cm, ____sea level to rise.
—Flight MU257 ____ . I must be off now. —Have a nice trip.
When ____ comes to saving energy, big changes start with small steps, like turning off the lights.
Of the two cameras, I would prefer_____ one, which is very easy for me to carry.
Mr Jones, a professor, ____ for his excellent lectures, is popular with his students.