（）pessimistic, it may be several months before we see a strong u

（）pessimistic, it may be several months before we see a strong upturn.
A、Be
B、Being
C、Very
D、To be
【正确答案】：D
【题目解析】：动词不定式作状语。句意：悲观地说，我们可能需要几个月才能看到强劲的好转。