Question

complete the text with the correct word. researchers at the massachusetts institute of technology discovered that dogs use more of their tongues when drinking ____ cats do. dogs use their tongues to scoop liquid into their mouths, while cats use only the tips of their tongues to draw up columns of liquid. then than

Explanation:

The sentence is making a comparison between dogs' and cats' tongue use when drinking. "Than" is used in comparative structures (with "more"), while "then" refers to time or sequence.

Answer:

than