He started to learn English in 1990 and in the years ________ he kept on using it in his work.
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.
. In my opinion, you can widen the _____ of these improvements through your active participation.
How can we get this language point _____ to the students.