—How can we reduce CO2 in our home? —It’s easy. off your TV or computers when you’re not using them, and you’ll greatly reduce it.
He observed a stranger __________ around the store at midnight. A, wandering B. to wander C. wander D. to be wandering
My sister, an inexperienced rider, was found sitting on the bicycle __________ to balance it.
We came home after our holiday only __________ our pet dog injured.
Start out right away,__________ you'll miss the first train.
Not only __________ polluted but crowded.