The pattern of China’s foreign trade has changed substantially s

The pattern of China’s foreign trade has changed substantially since China opened to the outside world.
A、considerably
B、partially
C、scarcely
D、suddenly
【正确答案】：A
【题目解析】：substantially意为“实质上，大体上，充分地”；considerably相当地，非常地；partially部分地；scarcely几乎不，几乎没有；suddenly突然；故选A。