51．Mr. White was a ____ man, so he usually forgot something.

A. great          B. busy         C. happy                D. good

(     )49.A.heavy      B.careful      C.beautiful      D.helpful

(     )48.A.on         B.into        C.up           D.to

(     )47.A.help        B.tell        C.ask          D.stop

(     )46.A.quickly     B.quick       C.fast         D.faster

(     )45.A.is becoming  B.becomes    C.become      D.has become

(     )44.A.cheaper       B.cheap      C.expensive     D.more expensive

(     )43.A.a few          B.few      C.little         D.a  little

(     )42.A.teachers       B.students   C.computers     D.scientists