21.I don’t like doing the …………… , especially cleaning the windows. A. homework B. housework C. job D. occupation 22. Nam and I are looking forward ………………….. you. A.to seeing B. of seeing C. for seeing D. to see 23. Mozart was one of the most famous…………… of classical music A. actors B.composers C.artists D.makers 24. Airmail is much.............. than surface mail. A. expensive B. very expensive C. more expensive D. most expensive