选择短语,并用适当形式填空over the past few years be highly possible so f

选择短语,并用适当形式填空
over the past few years be highly possible so far in another ten minutes
1 He hasn't decided whether or not to attend the meeting_______
2 Thanks to those policemen,there have been fewer crimes______
3 The scientists told us that it_______that orangutangs had been human's ancestry