【正文】
the days ____ they spent together. He remembers the days ____ were gone. 2 2. Do you fet the house ____ was sold? Do you fet the house ____ we bought? Do you fet the house ____ we often played games? 3. Tell me the reason ____ he was crying. Do you know the reason ____ was put forward by him? 4. She set such a difficult problem ____ nobody could solve it. She set such a difficult problem ____ nobody could solve. 5. He bought a car ____ was secondhand. He bought a car. ____ was secondhand. He bought a car and ____ was secondhand. He bought a car。 ____ was secondhand. 1. when。 that/which。 that/which 2. that/which。 that/which。 w