问题

Usually _______ questions are longer, so we must use longer sentences to speak more ______ to others.
A:polite; politely
B:politely; polite
C:impolite; impolitely
D:impolitely; impolite;
B:politely; polite
C:impolite; impolitely
D:impolitely; impolite;
正确答案是: