It is hard for me to imagine what I would be doing today if I ________ in love, at the age of seven, with the Melinda Cox Library in my hometown. 

 Peter ______ be really difficult to deal with at times even though he’s a nice person in general.

——Can I pay the bill by check?——Sorry, sir. But it is the management rule of our hotel that payment ____ be made in cash.

He is a very careful man, but he ________ make mistakes which seem ridiculous

 I insisted that he_______ at once.