1 . To our satisfaction, the exhibition has received a positive ________(respond) from visitors.

2 . In r______ to the big strike, the president promised that he would try to reach an agreement with the workers. （根据首字母单词拼写）

3 . The product was developed in r__________ to customer demand. (根据首字母单词拼写)

4 . We are lucky to be among the generation of people who have ______ and experienced the great social changes in our country.

A．conflicted	B．responded
C．witnessed	D．associated