南京2010二模If water becomes increasingly scarce in decades——water shortage will become a hot issueA coming Bhaving come C to come D to be coming为什么不选A?
问题描述：
南京2010二模
If water becomes increasingly scarce in decades——water shortage will become a hot issue
A coming Bhaving come C to come D to be coming
为什么不选A?
答
记住动词不定式表示将来或目的,反正未发生或非持续发生,而动名词表示已发生或持续发生,在这里这是一种假设,非发生所以用动词不定式.