Wolves are very ______: they can live in forests, on open plains, or in the snows of the Arctic.
The twin brothers look so alike that it is very difficult to tell one from .
----I just can’t help worrying about the result of my driving license test.---- . You can do nothing but wait.
He started school the same day as I did and ________ to it like a duck to water.
If Kate had known what was _______ for her, she would not have married Tom.
Halfway through the chapter _______ I hadn’t taken anything in.