---Who is the tallest boy? ---It ______ be John. John is of medium height.
How glad we are! Miss Li will teach _______ English this term.
--- he like singing? ---Yes, he .
---Daniel says hello to me every time he meets me. ---He is very _______.
---Would you like _______milk?---No, _______.
Susan is my good friend and she always helps me _______ my Maths.