21．Henry's birthday is on Saturday next month，but I don't remember date.
A．不填；the B．a：a C．a；the D．the；the
22．Tod the TV set for $500，which was much cheaper than he had expected．
A．bought B．paid C．cost D．spent
23．Occasions are quite rare I have the time to spend a weekend with my parents
A．while B．which C．why D．when
