补全下列句子，并加上标点。 

1.大雨过后，田里的禾苗挺直了                             □   

2.值日生把教室打扫得                                      □    

3.听了妈妈的话，我高兴得                                  □

4.马上轮到我演讲了，我紧张得                              □