He started to learn English in 1990 and in the years ________ he kept on using it in his work.
He is very popular among his students as he always tries to make them __________ in his lectures.
To their great relief, the missing child returned home,__________ after an absence of two weeks.
The first textbook written for teaching English as a foreign language __________ in the 16th century.
He was busy writing the story all the morning, pausing __________ to search for the right word.
__________ the adventure film will be shown in the cinema depends on the manager.