问题
British people say “please” and “thank you” all______ time， and they always keeptheir voice down in ______ public.
A:S+V+P
B:S+V+IO+DO
C:S+V+DO
D:S+V+DO+OC;
B:S+V+IO+DO
C:S+V+DO
D:S+V+DO+OC;
正确答案是：
