Before coffee was introduced, Muslims used to drink a special kind of soup to _______ awake.
The thing that_____ is not whether you fail or not, but whether you try or not.
_______ the teacher’s instruction in the lab_____ important.
E-mail, as well as telephones, ______ an important part in daily communication.
Professor Wang has written some short stories, but he is______ known for his plays.
The boy promised______ in the exam any more.