20. We have a high regard for Prof. Joseph because he always ____his principles.
A. lives on
B. lives up to
C. lives through
D. lives with
21. My grandfather accidentally ____ fire to the house.
A. put
B. took
C. set
D. got
22. We enjoyed the holiday ____ the expense.
A. except
B. besides
C. in addition to
D. except for
23. If you want children to work hard you must ____ their interests instead of their sense of duty.
A. appeal to
B. look into
C. give rise to
D. go in for
24. Basically a robot is a machine which moves, manipulates, joins or processes ____ in the same way as human hand or arm.
A. characters
B. components
C.catalogues
D. collections
25. Of course, talking about something which affects them personally is ____motivating for students.
A. chiefly
B. correctly
C. currently
D. eminently