单项选择题
（）evidence that language-acquiring ability must be stimulated.
A．If being B．It is C．There is D．There being
单项选择题 Jack's father suggested that Jack（）in London for a few more days.
单项选择题 I think you have talked too much; what you need now is more action and（）talk.
单项选择题 This terrible accident happened（）the cold evening of Oct. 5, 1989.
