21£®Last night, an accident happened at ________ crossroad a few meters away from ______ supermarket£®

       A£®a; a          B£®/ ; a                C£®/ ; the            D£®the; /

22£®_________ she forgets to bring a health certificate?

    A£®What if       B£®How about         C£®What for     D£®So what

23£®It is difficult for a teacher to give __________ attention to children in a large class£®We should reform the situation in order to meet each child’s needs£®

       A£®private          B£®personal         C£®individual        D£®single