It's quite strange that the man sleeps with his mouth ________ and his eyes________.

Facing this ________ problem, I found myself ________ about how to work it out.

As many as 100 species of fish, some ____ to these waters, may have been affected by the pollution． 

I's ________ of Bob to do a disappearing act just when there's work to be done!

 When we plan our vacation , mother often offers______suggestions.