非谓语动词填空.容易
1.ask sb 是to do something .还是do something?
2.allowed sb.是to do something ,doing someting 还是do something?
3.let sb.do sth.还是to do something?
4.order sb. to do something 还是doingsomething 还是do something ?
5.这个我最不懂了
saw sb. do sth.还是doing sth .还是to do something
实例：he saw her _____________(call) her mother .she looked excited.