He stopped his ears with his hands to _____ the terrible noise.
Children under six are not __________to school except those of extraordinary intelligence.
When the headmaster spoke out his plan, the _________of the students in the class _________ against it.
Thanks to the advice _______ by the experts, we finished our task at an amazing speed.
The dictionary, a few pages ________ are missing, is of no use.
To ______ the other players, the athlete ________ a lot of difficulties in his training.