I get what they're going for here, but the first "in" is redundant, although not technically wrong.
It is the same thing for all the sentences with be in this lesson. Systematically both in and into are mandatory. Again the present continuous is rejected.
The policemen look in the car. should be accepted. "into" is no required in English.
It's the inconsistency that annoys me. In most cases in these lessons, in AND into should be accepted as mandatory.
I'm very sure that shortly I will read a sentence with "benéz" in it and the answer will be "look in" !