I believe this sentence would sound better this way: They tiptoed past the director's room.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
fireflysaigonThey were walking on tiptoe __ the director's room.My guess is, this sentence may have been written by an non-native author. In real Englsih environment, tiptoe- refers to mvoing your boby forward without your heels touching the ground, whereas "walking" is the opposite. So either one is "tiptoeing" past an obj