Here are the sentences completed based on your prompts:

25. My teacher asked me to be here at 10 am.
→ I **was asked to be here at 10 am by my teacher.**

26. Most students are frightened of speaking a foreign language.
→ Speaking a foreign language is **frightening for most students.**

27. The meeting was so boring that I almost fell asleep.
→ I **almost fell asleep because the meeting was so boring.**

28. The teacher found her pupil’s exam results disappointing.
→ The teacher was **disappointed with her pupil’s exam results.**

29. It is three months since he last attended a meeting.
→ He hasn’t **attended a meeting for three months.**

30. They consider acupuncture is very safe with enough precautions.
→ Acupuncture is **considered very safe with enough precautions.**