The farmer had to wear heavy boots in the winter because the fields were too wet and________.
D
暂无解析
She________hernervousnesstotheimportanceoftheinterview.
________somanypeopleintheUnitedStatesbeenoutofworkastoday.
Whenhesuddenly________upthesubjectofgeneticengineering,therewasanembarrassedsilence.
EachyearintheUnitedStates,manyblackteenagers_______ofschool,eitherbecausetheycannotkeepuportheyhavetoworktosupporttheirfamily.