Mrs. White found her husband surrounded by letters andpapers and_______ very worried.

下列各句中，没有语病的一项是（　　）

Mr. Wang made up his mind to devote all he could ________ his students’ English.

Now I spend time _____ what I love to do.

— He _____ without our help. — Yes, I know. We have to admit that nobody can match him. [ ]