单项选择题
The President fumed at questions of whether the nuclear summit and surrounding meetings were tailored to his political ______.
单项选择题 He sat ______ his head, trying to think of the answer.
单项选择题 The ______ of rain forests may hamper a developing country in its fight against poverty.
单项选择题 The publishing company offers their staff opportunities for ______ in decision-making.
