Insummer,shewouldsitinthegardenenjoyingthefreshairandthesmellofthethingsshe______.
In1900,theenergyderivedfromburningpetroleumwasonlyfourpercent______ofcoal.
4岁以上的儿童化脓性脑膜炎最常见的病原菌是（）
列出引起哮喘发作的常见病因。
Hertalentandexperience______hertotherespectofhercolleagues.
