These flowers should not be watered too ______, once _____. 

The green-hand cook        the soup by putting in too much salt accidentally．

、Amy thought it was __________ to read English newspapers every day so she subscribed to（订阅）the 21st Century.

There is gas _______ somewhere; can you smell it?

Audiences were greatly ______ by the video class about weightless conditions _____ in Tianggon-1 space station.