根据句意，用所给动词的适当形式填空。
—We haven’t heard from Jane for a long time.
—What do you suppose _______(happen) to her?
The second Youth Olympic Games _______(hold ) in Nanjing in 2014.
I tried many ways I could think of _______ (stop) the little boy from crying.
Some students seem to have difficulty _________(control)their actions.
The little girl dare __________ (swim) in this deep river now.