请用for或since填空 1. We've lived here _____ 1980. 2. So you've lived here _____ about 30 years. 3. Miss Lin has taught us English _______ we came to this school. 4. I'm looking after Tom today. He's been in my house _____ 8:00 this morning. 5.He has been here _____ five weeks. 6. He has been here _____ five weeks ago.