We were swimming in the lake _____ suddenly the storm started.
. Kate's ambition to become a nurse _____ from a desire to help others.
The storm sweeping over this area now is sure to cause _____ of vegetables in the coming days.
Dress warmly, _____ you'll catch cold.
. Don’t _____ the news to the public until we give you the go-ahead (许可,准许).
This book gives a brief _____ of the history of the castle and details of the art collection in the main hall.