41.Mary has a _______ view of our future. But nobody believes what she said.

　　A. portable B.primary C.possession D.positive

　　42.Nobody knows his _______ for helping us.

　　A. motive B.motion C.mood D.moral

　　43.Both sides agree to establish a _______ zone between the south and north.

　　A. midst B.mild C.mention D.neutral

　　44.This is a _______ moment for our research. We should be careful.

　　A. critical B.belt C.conscience D.copper

　　45.This textbook is for the _______ students, not for the beginners.

　　A. observation B.transportation C.advanced D.transfer

　　46.When I read the newspaper, I always read the _______ first.

　　A. headlines B.headquarters C.heaven D.horizon

　　47.They _______ our house at $10,000.

　　A. count B.vanish C.weave D.assess

　　48.When he studied at college, Jack was supported by a _______.

　　A. treatment B.assistance C.scholarship D.protein

　　49.Even as _______, he made several wonderful inventions.

　　A.a stock B.a representative C.an undergraduate D.a gulf

　　50.An emergency _______ is very important in case of fire.

　　A. exit B.deposit C.discharge D.elaborate

　　答案:

　　41.D 42.A 43.D 44.A 45.C 46.A 47.D 48.C 49.C 50.A