Select the most appropriate option to fill in the blank.

Crowds of tourists ______ across the square all day long.

flowed

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

• Rectified means to correct or put right. It is not the most appropriate word to use in this context, as it does not make sense to say that crowds of tourists rectified across the square.
• Prodded means to poke or jab. It is not the most appropriate word to use in this context, as it does not make sense to say that crowds of tourists prodded across the square.
• Maintained means to keep in good condition or repair. It is not the most appropriate word to use in this context, as it does not make sense to say that crowds of tourists maintained across the square.
• Flowed means to move smoothly and freely in a continuous stream. It is the most appropriate word to use in this context, as it makes sense to say that crowds of tourists flowed across the square.