— _______ I ask you something, if you are not busy?—Yes, of course you _______. 

It is beyond my understanding that many adults ________ be so crazy about Harry Potter series.

The winner of the race is tall and thin; he _______ be my friend, Mike, who is short and fat.

---Can I watch TV now? ---No, you         .You________ do your homework first.

You'd better take a heavy coat. Sometimes it ______ be very cold.