The convenient media give people the chance to have the information we look forward_____ to them quickly and cheaply.

 ______ the train, they decided to wait for another. 

 In my opinion, keeping dogs well ________ up is advisable for dog owners.

After the snowstorm, mailboxes in the community were covered by snow, or _______, or lying on the ground.

单项选择（每题1分）She opened the window, _____ in some fresh air.