1. The students are learning English because it is the international language.
2. The TV whose father bought last week is broken.
3. We pleased teacher so we can study in a good school.
4. Last night I felt tired so I went to bed early.
5. Although the teacher is busy, he still come to our English speaking club last week.
6. The foreigner asked me to speak any language.
7. Father told me that he met my friends..
8. The doctor whose daughter is my friend speaks French well.
9. This exercise need to do carefully.
10. Environmental pollution is one of the most seriuos problems facing mankind today.