单选题 The officer allowed ______.

A、 the students to fly the plane all the time
B、 all students to fly the plane
C、 the students who were not frightened to fly on their own
D、 some students to fly a little while

【正确答案】 D

【答案解析】此考题为细节题。根据文章第3段首句The officer．．．allowed them to fly the plane for a few seconds if they wanted to and if they were not too frightened to try...，即可断定D正确。