The door opened and in ________.
There are frequently reports of accidents as fireworks ______, stored or transported.
Plastic bottles can be recycled but they need cleaning thoroughly, _______ they?
Of all the methods they provided, ______ is of any help for solving the math problem.
—Tom seems to be familiar with London. ---Yes. He ___________ here for three years. It’s great for him to be back.
A modern city has been built _____ a very small village was many years ago.