She had to work deep into the night, ______she couldn't have spread the messages to all the relevant people successfully.
Although this phenomenon can’t be understood, it can be ___ in fact.
The children grew up in beautiful ___ but not in a happy home ___.
The most appropriate time for our meeting is ___ this Friday.
They tried to persuade him to ___ the post but he declined.
The wind is blowing hard; please make sure all the windows are ___ properly.