He started to learn English in 1990 and in the years ________ he kept on using it in his work.
— I’m still working on my project.— Hurry up, or you’ll miss the deadline. Time is _______________.
The command has just arrived that all employees ____________ in their proper uniforms before 7:00 pm.
I just wonder ____________ that makes him so excited.
— So many ages since I last saw you that I ____________ you at all!— I wouldn’t have, either, if someone _____________ your name.
Stanford University was founded by Leland Stanford in 1884, _______________ his son who had died before.