1. — What are you doing this Saturday?
— I'm not sure, but I ______ go to the Rolling Stones concert
A. must B. would C. should D. might
2. —How lucky! I should get my lost iphone back after I left it somewhere while I was shopping in the mall.
—Couldn’t agree more! You know, someone _______ it.
A. can have taken B. might have taken C. should have taken D. must have taken
3. — Good morning, Sir. You were looking for me just now?
— Yes. I _________ have a talk with you. Will you come to my office now?
A. had better B. would rather C. may as well D. would like to
4. When I was a child, I ______ watch TV whenever I wanted to.
A. should B. could C. must D. need
