Question

It's a good idea to prepare a room when you are a painting it. _______, put painter's tape around the ceiling and floor.

which transitional word best fills the blank space?

first
lastly
similarly
However

Answer 1

The best transitional word to fill the blank space is **first**. The sentence would read: "It's a good idea to prepare a room when you are painting it. First, put painter's tape around the ceiling and floor." This indicates the initial step in the process of preparing the room for painting.