试题题干
The highest duty of the U.S. President is （）.
参考答案
正确答案：
试题解析
The president of the United States heads the executive branch. 意为美国总统领导行政部门。
The highest duty of the U.S. President is （）.
The president of the United States heads the executive branch. 意为美国总统领导行政部门。