The theory he sticks to ______ to be of no use in our studies.
______ professional violinist practises for several hours a day , but ______ violinist has his own way of playing the Beethoven concert .
Mr Zhang gave all the textbooks to all the pupils , except _____ who had already taken them .
Shortly after the accident , two ______ police were sent to the spot to keep order .
My dictionary ________ . I have looked for it everywhere but still ______ it .
The news about the terrible flood there greatly discouraged ______ these for a sight-seeing .