Zhang Yining has trained continuously for six hours. ______ she is tired out.

Is this your book, Alice? —Yes, it is ____ book. Thank you.

The children the cars this.

The man in a black suit _______ be our youth worker. — I’m sure it _____ be him. I saw him in the laboratory building some minutes ago.

Bruce,how many students are there in your school?—Mmm, about.