People complain that decisions to approve or deny a permit are often ______ rather than based on fixed criteria.

 Professor Williams keeps telling his students that the future ________to the well－educated.

Some modem paintings are _____ my understanding;  I simply can't understand what the   painters really want to tell us.

Paper produced every year is ________ the world’s production of vehicles.

Mr. Brown’s condition looks very serious and it is doubtful if he will ________.