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