下列各句中，没有语病的一项是（ ）

You’ve dropped ________ “s” in the word“necessary”.— Oh, ________ letter “s” is doubled.

The roommates have lived for three years and not once _____with each other.

ou return the book you borrowed from Tom— Yes, I gave it to him ______ I saw him.

Everybody believed the man ______ away the diamond ring.[ ]