We need to learn __________ be polite when we make requests.a. what to b. why to c. how to d. whether to
---Can I have _____cakes, please? ---Sorry, I don’t have _____cakes.
My brother often _______ e-mails to his pen friends.
How many classes _______ every Monday morning?
His birthday is coming, he wants to have a party ______ 6:00______ home.
The new coat makes him _________ so smart.