—Is Richard still living here?—No, he_____ to London already.
.It’s important __________ us students _______ carefully in class.
How many students are born _________the star sign of Aquarius in your class?
My cousin is _____________ sometimes. It’s hard for him to change his mind even though his idea is not right.
Thank you for _________ me presents.
Dung is kind and helpful, but he is also a little careless _____________.