At first Bob was puzzled by Virginia s waving, but then it _____ his mind that she was trying to tell him something.

　　A. crossed    B. passed    C. occurred    D. opened

 The shop-assistant was straight with his customers. If an article was of _____ quality, he'd tell them so.

　　A. humble    B. minor    C. inferior    D. awkward

We finally managed to _____ the committee's approval of our plans.

　　A. secure    B. arouse    C. acquire    D. exert

 The writer was always looking for suitable _____ to use in his next story.

　　A. contents    B. articles    C. notions    D. ideas

 She once again went through her composition carefully to _____ all spelling mistakes from it.

　　A.withdraw B.abandon   C.diminish  D.eliminate

 His test results are not very _____. He does well one week and badly the next.

　　A. invariable  B. consequent C. continuous D. consistent

Circus tigers, although they have been tamed, can _____ attack their trainer.

　　A. unexpectedly    B. deliberately 　C. reluctantly     D. subsequently

Professor Jordon is well known for his _____ into the habits of the common housefly.

　　A. examination    B. introduction　　C. research       D. expression

 What makes the space shuttle _____ is that it takes off like a rocket but lands like an airplane.

　　A. exceptional    B. strange    C. unique    D. rare

 He has left his book here on _____, so that you can read it.

　　A. purpose    B. intention    C. aim    D. meaning