1 . 单句改错
1. Hard work have made him very ill.
2. Finally, there were a sudden pull at the pole and a fish was caught.
3. Generally speaking, when take according to the directions, the drug has no side effects.
4. Never before do I seen such a wonderful park, where I'd like to pay a visit again.
5. In front of our school stand a tower on whose top we can have a clear view of the lake.
6. They were two reasons for the decision.