Select the most appropriate option to fill in the blank.

I like to read the newspaper ______ the morning.

in

The most appropriate option to fill in the blank is in.

The word "in" means during a particular period of time. This is the most appropriate word because it accurately describes when I like to read the newspaper. I like to read the newspaper in the morning.

The other options are not as appropriate.

• By means near or next to something. It does not make sense in the context of the sentence, because I am not reading the newspaper near or next to the morning.
• On means in contact with the surface of something. It does not make sense in the context of the sentence, because I am not reading the newspaper in contact with the surface of the morning.
• At means in a particular place or position. It does not make sense in the context of the sentence, because I am not reading the newspaper in a particular place or position in the morning.