Choose the correct answers for the given sentences.

1) c) yesterday; 2) d) often; 3) b) Listen!; 4) a) next Saturday; 5) b) collect; 6) c) travelled; 7) a) will ski; 8) b) is skating; 9) a) is; 10) c) bought; 11) b) drew; 12) a) grows; 13) d) is riding.