Accustomed to ______ the steep mountain, he had no difficulty reaching the top. 

—The weather isn't good enough for an outing，is it?—Not at all. We can't have ________ at this time of the year.

_______ I want very much is a new car.

Most students expect ____more review classes before the exams.

The islands developed on their own for 80 million years and ________ have many rare animals found nowhere else.