John ______ leave for New York tomorrow, but I’m not sure.

 Personally, the job as a teacher _____ be challenging, for I sometimes _____ deal with some smarter but less diligent students. 

— Did you visit the museum today? — No. We ______ it, but we spent too much time shopping.     

_____ you tell me how to use this digital dictionary?

--Mr. Yang looks rather a kind gentleman.   ---But in fact he is cold and hard on us. You _____ believe it!