1．The professor was _____ angry to say anything at all．
A） too much B） so much C） too D） so
2．Machines are _____ no use without the power to run them
A） at B） by C） in D） of
3．Before you can print this information in the newspaper, you need to _____it．Find out if what you heard is really true．
A） approve B） sanction C） demonstrate D） verify
4．_____ prices so high, I'll have to do without a new suit this year．
A） WithB）Because C） Because of D） As
5．The teacher sent Jerry to the principal because of his _____ behavior．Jerry threatened to fight another student．
A） progressive B） impressive C） aggressiveD） extensive
