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。 1．i sent a big bunch of flowers to the nurse as an of thanks for her taking good care of my grandpa in the nursing home.
a．attitudeb．impress ionc．appreciationd．expression
2．shelly had prepared carefully for her biology examination so that she could be sure of passing it at her first
