Something _______ wrong with the machine, and it _______ not work. 

We are all ____________ in books these days since the exams are coming.

— Jim has gone to Britain to see a modern art exhibition. — Oh, really? Do you know when he       ? 

Ever since middle school, my sister and I ________ about taking a bike trip.

—Guess what? I happened to have met Mark at the party last week． —If my memory serves me correctly, you two ______ each other for almost ten years．