I like getting up very early in summer. The morning air is good _______.

Although the huge engine, as tall as 25 meters, is heavy_______, it is powerful and works well. 

________warm at night，I would fill the woodstove，then set my alarm clock for midnight so I could refill it.                                              (2013·湖南，31)

The heavy snow lasted for a week, _____ a serious traffic confusion in the whole area.

 It is no use ____ with that mean storekeeper, for he won’t cut down the price.