But for their assistance our corporation would not have made such a great progress __________
A、soon than what had expect
B、soon than what was expected
C、sooner than what had been expected
D、sooner than what was
【正确答案】：C
【题目解析】：句意：如果没有他们的协助，我们公司不可能比预期更快地取得如此大的进步。than和比较级连 用，故排除A和B选项。由句意可知，本题选C。
