3. Not having been to the national park before, the boys were amazed to see the lions.
4. Had we set off early this morning, we would have arrived at the concert now.
5. She finds it easy to live in Viet Nam. She is used to eating rice now.
6. I will wait for you outside the school gate until you finish your examination.
7. I was late for school yesterday morning. I should have gotten up earlier.
8. The path was made by walkers who crossed the mountains last summer.
9. We’d better cancel the picnic because of the bad weather.
10. The boy is believed to have won a scholarship to study oversea last year.