The president, accompanied by his assistants, ______.

The president, accompanied by his assistants, ______.
A、have arrived
B、are arriving
C、had arrived
D、has arrived
【正确答案】:D
【题目解析】: ”accompanied by his assistants“ 是插入语,真正的主语是The president 因此谓语动词要使用三单形式,选择D