A-A+
Having finished their morning work the clerks
问题详情
Having finished their morning work, the clerks stood up behind their desks, ______ themselves.
A．expanding
B．stretching
C．prolonging
D．extending
参考答案
正确答案：B
解析：stretch oneself伸懒腰，伸展身体；expand伸开，展开；prolong延长(时间)；extend伸长。句意：做完了上午的工作；职员们从桌子后面站起来，伸展伸展身体。
