In the following questions, sentences are given with blanks to be filled in with an appropriate word(s). Four alternatives are suggested for each question. Choose the correct alternative out of the four as your answer.

He slipped .......... . his old ways and started drinking again.

Options

A. off
B. by
C. in
D. into

Answer

D

Explanation

slip - into (Verb + Prep.) : to pass into a particular state or situation, especially a difficult or unpleasant one
Here, slipped-into is the right usage.