当有人问你“Where is your book?”时,你应该回答: A. This is. B. It is. C. Here it is.
My birthday is _____ April 10th.
Your brother looks _____ younger than you.
Would you mind _____ the window for me?
It is very ______ of you to make such stupid mistakes.
-- Mom, we are running out of milk. -- Let's go to the ______ to buy some.