—Be quite, the head teacher Mr. Qian is coming. —Don’t worry. It _____ be him. Mr Qian is much fatter.

 This blue car ____________ be Bob’s bcause his car is black.

— Look at the boy playing basketball on the ground. Is it George?— It ________ be him. He told me he would play basketball after class, but he’s not sure.

It doesn’t often snow in my hometown in winter, but it ___be rather cold sometimes. 

 A mistake ______ have been made on our bill. We didn’t order any fish today.