He sat at the desk, __________ a novel.
The best job is ____which uses your skill in doing something with your interest in the subject.
Teenagers are warned to be careful when making friends online, because when you can’t see a person, they could be __________.
— Have you got used to the Chinese food, Robert?— Yes. But I don't like _____ when a Chinese host keeps serving me the food I don't like.
The book is of great value. _______ can be enjoyed from it until you have a deepunderstanding of it, however.
The tutor(导师)asked his students to leave a wide ________ when typing their essays.