针对公平条件下数量猛增的进口产品，世界各国所采用的贸易救济措施为( )。

A．反倾销

B．反补贴

C．保障措施

D．进口许可证

Be careful when you come _____ the street, because the traffic is very busy at the moment. [ ]

A. across

B. behind

C. between

D. over