21. My grandfather accidentally ____? fire to the house.
A.putB. tookC.setD. got
22. We enjoyed the holiday ____? the expense.
A.exceptB. besides
C. in addition toD. except for
23. If you want children to work hard you must ____? their interests instead of their sense of duty.
A. appeal toB. look intoC. give rise toD. 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. chieflyB. correctlyC. currentlyD. eminently