________ along the Silk Road led to world-wide business 2,000 years ago.
A．Trading B．To trade C．Traded D．Having traded
Brian talks to me like a child, _______ really annoys me.
A．who B．whom C．which D．where
--- Alice looks sad. Did you tell her about her brother’s accident?
--- Sorry, I ________ her just before her final exams.
A．can’t tell B．mustn’t have told
C．needn’t tell D．shouldn’t have told
_______ we have planned ahead might change when we put it into practice.
A．Whatever B．Whenever C．Whoever D．However
I’m not satisfied with my study, so recently I ______ a talk with my teacher.
A．have B．had C．am having D．would have
The man put out the cigarette when _______ that smoking was not allowed on the train.
A．reminding B．reminded C．to remind D．being reminded
