WHY DON’T YOU PUT A BETTER LOCK ON THE DOOR

Câu 7.

Why don’t you put a better lock on the door?" said John.

The custom was born because the practice was spread

A. John suggested to put a better lock on the door.

B. John asked why not putting a better lock on the door.

________ the nation.

C. John suggested putting a better lock on the door.

A. of

B. out of

C. throughout D. at