—He looks very happy. He ____have passed the exam, —I guess so. It’s not difficult after all.
________that you come here earlier tomorrow or you'll be in trouble.
Shut the window,________ it'll get too cold in here.
I was so careless in the exam.________,I made so many mistakes.
We hope to move to the country in the ________ future.
I always prefer ________ a bike rather than ________ to work.