Many early Europeans, ________ the earth to be flat, feared that Columbus would fall off the edge of the earth.
It’s said that Singapore is really a beautiful country. I’m considering _______ it.
Mary three of her classmates invited to the party.
When I woke up, I found myself ______ in bed and ______ by doctors and nurses.
— What does the sign over there say? — No person ______ enter the area without the official permission.
It’s the protection for the trees ______ really matters, ______ how many trees are planted each year.