Join subordinate clause asyndetically, wherever possible. Join subordinate clause asyndetically, wherever possible.
1. New achievements in space flights are the things in which many people are interested.
2. The scientist solved the problem at which he had been working for a long time.
3. The problem that is being discussed now has interested many scientists.
4. The rays that Rutherford discovered were alpha rays.
5. The device that was used in our experiment is called a rectifier.