2. Yesterday my teacher said that I had to work harder to improve my English pronunciation.
3. Jenny has had Math three time a week.
4. We received the report a long time ago.
5. My mother told me to spend more time on History.
6. Last semester she got good grades at Science but the chemistry results were poor.
7. His grandfather told him to write to her once.
8. His mother is very sad because he studies badly every semester.
9. Bao spends his free time on doing volunteer work.
10. Song always plays soccer everyafternoon, but last Saturday afternoon he played basketball.
11. We raise funds by collecting waste paper and broken glass.
12. We are going to clean lakes' banks in the weekend.