41.Students with _______ problems may apply for student loans.
　A. economic B.financial C.male D.economical
42.Both sugar and salt can ______in water.
　A. desert B.absorb C.dissolve D.involve
43.I have not heard anything from him since his _______.
　A. departure B.fault C.foundation D.acciptance
44.Without a proper education, people could _______ all kinds of crimes.
　A. conduct B.stoop C.commit D.sweat
45.Several loudspeakers are _______ from the ceiling and we can hear the speaker very clearly.
　A. connected B.sustained C.associated D.suspended
46.This morning in the class, our teacher lost his _______ at last because he could not stand any more.
　A. temper B.terror C.verse D.contain
47.It is not ---_______ for me to return all the books to the library now because I still need some of them for my research.
　A. continuous B.difficult C.convenient D.sufficient
48.When traveling alone in the mountains, you’d better take a _______ with you in case you get lost.
　A. compass B.compress C.complse D.campus
49.As a teacher, you should not _______ the students from asking questions in class.
　A. ruin B.restrain C.import D.impose
50.If you have any problems during your study here, please do not _______ to call me for help
　A. hesitate B.despair C.urge D.request