问题补充：
根据句意，用所给动词的适当形式填空。
【小题1】—We haven’t heard from Jane for a long time.
—What do you suppose has happened(happen) to her?
【小题2】The second Youth Olympic Games will be held(hold ) in Nanjing in .
【小题3】I tried many ways I could think of to stop (stop) the little boy from crying.
【小题4】Some students seem to have difficulty controlling(control)their actions.
【小题5】The little girl dare swim (swim) in this deep river now.
答案：
解析：
试题解析：
【小题1】考查现在完成时。句意：我们很久没有收到琼的来信了。你猜她发生什么事情了？happen to发生，根据haven’t heard from没有收到来信，可知为现在完成时，故答案填has happened
【小题2】考查被动语态。句意：第二届青奥会将于在南京举行。hold举行，根据in 在，可知为一般将来时，举行不能由主语发出，应为被动语态，故答案填will be held
【小题3】考查不定式。句意：我试了很多能想到的方法，去阻止小男孩大哭。stop阻止，I could think of我能到的，定语从句修饰ways,try to do试着做，故答案填to stop
【小题4】考查动名词。句意：一些学生似乎在控制他们的行为方面有困难。control控制，have difficulty doing sth做某事有困难，故答案填controlling
【小题5】考查情态动词。句意：小女孩现在敢在这条深河里游泳了。swim游泳，dare敢，情态动词，后接动词原形，故答案填swim
根据句意 用所给动词的适当形式填空。【小题1】—We haven’t heard from Jane for a long time. —What do you suppose h
