—Look! A book is on the floor. Whose is it?

—It ______be Rick's. It has his name on it.

A. mustn't        B. can't           C. must D. need

--- Whose French book is it?

--- It __________ be Lucy’s. Look! Her name is on the book!

A．must             B．mustn’t          C．might             D．can’t

Have you heard of Zhai Mo ______became the first Chinese person to travel around the world in a sailboat?

A. that     B. whose    C. which    D. whom

Please pass me the cartoon book _________ has a Mickey Mouse on the cover.

----Whose model plane is it?    ----It’s ________.