单项选择题

Directions :In this section, there are 10 incomplete sentences. You are required to complete each one by deciding on the most appropriate word or words from the 4 choices marked. Then you should mark the corresponding letter on the Answer Sheet with a single line through the centre. The noises near the factory are ______ loud ______ they hurt our ears and may drive us mad.

A. enough...as
B. such...as
C. very...that
D. so...that