As he in the river for five hours, the thief looked very pale and hopeless.
Atrapped
B. has been trapped
Ctrapping
D. had been trapped
网友回答
A. trapped
B. has been trapped
C. trapping
(答案→)D. had been trapped
解析：考查时态。句意：当那个贼在河里待了五个小时，他看上去脸色苍白似乎绝望了。根据句意说明D正确。