In English-speaking countries, a person with a large vocabulary is ________ a walking dictionary．

1. A.
   referred to
2. B.
   compared to
3. C.
   thought of
4. D.
   devoted to

In English-speaking countries, sometimes people express their meanings in a way __________ is different from each other．

1. A.
   in which
2. B.
   for which
3. C.
   what
4. D.
   that

Students in English-speaking countries usually address their man teacher ‘sir”, but __________ their woman teacher “madam”.