21.The moment we heard the news of the earthquake, we began to ________ the work to rescue those who were trapped in the building.
I'm interested in ______you have said.
.I want to use the same dictionary ______was used yesterday.
He isn't such a man ______he used to be.
He is good at English, ______we all know.
He talked a lot about things and persons ________they remembered in the school.