— Do you know our town at all? — No, this is the first time I_____ here. [ ]

The boy has made rapid progress in English this term, _____ the teacher praised him yesterday.

Traffic was ____ for several hours by the accident.

Messages that abuse or threaten others, and have commercial or advertising content or links maybe________ when you submit some comments on the Internet. [ ]

It seems that living green is ________ easy andaffordable. A small step makes a big difference.