41.Professor Smith seldom _______ the class on time.
A.dismisses B.nervous C.misleads D.regrets
42.Mr. Wang _______ his wife and children when he went to the United States.
A.prescribed B.delayed C.decreased D.deserted
43.He _______ a lot of time in trying to develop the education system in this area.
A. involved B.investigated C.invested D.interfered
44.They spent many years _______ for oil in this small island.
A.exploring B.exploding C.exposing D.exploiting
45.We can’t _______ the fact that we are still a developing country.
A. ignore B.neglect C.imagine D.impress
46.Can you _______ the man who robbed you of your watch?
A. illustrate B.exhibit C.damage D.identify
47.Many children in developing countries can not go to school,because of _______
A.property B.sword C.trace D.poverty
48.What is your _______ to his coming?
A.altitude B.attitude C.attribute D.aspect
49.He _______ into the water and rescued the little girl.
A. inserted B.sloped C.heaped D.dived
50.You may _______ of the extra books in our department library.
A.deposit B.enclose C.fade D.dispose