He started to learn English in 1990 and in the years ________ he kept on using it in his work.
—You will never believe that it took us two hours to get to the restaurant.—Really? You ________ in a traffic jam.
—Jim is very sick these days. He coughs so badly.—In my opinion, he really ________ listen to the doctor and cut down on smoking.
—Where did you get this book?—I picked it up from a secondhand bookshop if you ________ know.
When Harry was at college, he ________ go to the reading room after supper every day.
Don't be angry with us. We ________ with you together, but we were busy with our final reports when you called in.