What lesson are you on that would help just a little bit
The the the then the the egg
Answer:
at
Explanation:
It is most likely at but all of them gramatically make sense but not physically.
For example, you cannot stand in a door but the sentence is correct.
Standing on a door is quite strange but the sentence itself makes sense
1. Racing
2. Collecting
3. Digging in the garden
4. Hooking the cars together
5. Exercising daily