"We see the teacher in the restaurant."

Translation: Wir sehen den Lehrer im Restaurant.

[JetThought3]

The second sentence is "We see the teacher in the girl" O_O

[abderrahimo]

we don't get the same sentences nor the same type of questions

[abderrahimo]

Why is the "Wir sehen den Lehrer im dem Restaurant" wrong ?

[daerharas]

Im is a combination of "in + dem" so it takes the place of dem. You could either say "in dem Restaurant" or "im Restaurant."