A) 单项填空 从A、B、C、D四个选项中，选出可以填入空白处的最佳选项．
21．-It looks heavy．Shall I give you a hand?  -___________．
    A．No，never mind     B．Yes，my pleasure    C．No，thanks     D．Yes，I do
22．-How beautiful Sandy looks_________ blue!
    -I’m sure this blue skirt will look nice_________ you，too．
    A．on；in             B．in；on             C．for；on        D．to；in
23．My watch doesn’t work．I must have my brother________ it．
    A．repaired            B．repairs             C．repair         D．to repair