The politician has been warned that he would be getting into great trouble _______ stick to his standpoint.

(2013·辽宁五校第一联合体高三考试)The little child ________ go out alone at night, so he ________ walk in the dark that night.

John, look at the time. ______ you play the piano at such a late hour ?

－Why didn’t Susan come to see us yesterday as she promised?－______. 

____ it rain tomorrow, we would have to put off the visit to the Yangpu Bridge.