The road construction is based on the agreement, one of _______ purposes is to ensure its completion on time.

The_____boy wondered why fish soon went_____in hot weather. He went to ask his teacher.

Mr Green asked Lily ______ she had written to her father _____.

After a long walk, the girl felt very __________.

is so excited!—Oh, yes! She is busy preparing for her trip to Africa that she _____ for years.