He started to learn English in 1990 and in the years ________ he kept on using it in his work.
Willpower is a kind of quality, ______ is ______ it takes to do anything well.
The big fire in Shanghai, believed to ______ due to the burning of construction materials, caused 58 deaths and destroyed all the belongings of the people there.
Your meaning didn’t really ______, John. I didn’t ______.
— Hello, Sally. How’s everything going?— ______.
The girl hid herself under the table ______ she could see everything taking place in the room.