从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21．Who do you think takes _____ possession of the flat equipped with ____ air conditioner?
A．the; the B．/; an C．/; the D．a; an
22．--- A microwave oven must be convenient to a busy couple like us．
--- _________, dear．But when do you plan to get it?
A．I just can’t agree more B．A pleasure
C．Good heaven D．No wonder
