问题
选择题
Mr. Richard was disappointed that many students who had signed up for his adventure course _______ at the last moment.
A．left out
B．got out
C．passed out
D．dropped out
答案
答案：D
考察词组辨析。Leave out 遗漏，省去 get out 离开 pass out 昏倒，失去知觉 drop out 退出，退学
句意为，理查德先生非常失望，因为很多报名参加他的冒险课程的人在最后一刻选择了退出。