1. He is too young to do the job successfully (well).

2. As is known to all, English is a widely used international language.

3. The road is reported to have been widened to improve the traffic condition before the EXPO．

4. Only by your own experience can you figure out how important volunteer work is!

5. No sooner had the rescue team arrived than they began their (rescue) work and (they) were highly praised by the international society.