19.（单选题）They usually have less money at the end of the month than ______ at the beginning.

A. A.do

B. B.don’t do

C. C.didn’t do

D. D.will not do

A. A.aware of

B. B.aware that

C. C.aware of that

D. D.aware

A. A.whoever

B. B.that

C. C.whom

D. D.who

A. A.must have passed

B. B.would pass

C. C.have passed

D. D.could passed

A. A.worth

B. B.worthwhile

C. C.worthy

D. D.valued