国家开放大学 / 综合英语(3)
正确率:100%
A person _ _ _ with a laser can aim this coherent light, _ _ _ _ a laser beam, in any direction.
A. work; call
B.working; called
C.working; call
D.worked; calling
A. work; call
B.working; called
C.working; call
D.worked; calling
参考答案:
佳题速递: