Don’t forget the day ______you were received into the Youth League.
| A．when | B．that | C．at which | D．where |
All the apples _____ fell down were eaten by the pigs.
| A．those | B．which | C．what | D．that |
The red rose is the only one _____I real like.
| A．which | B．who | C．that | D．whom |
The teacher told me that the students I wanted to see were seen___ football on the playground just now.
| A．playing | B．to be playing | C．play | D．to play |
Is the river_____ through that town very large?
| A．which flows | B．flows | C．that flowing | D．whose flows |