The play had already been on for quite some time when we __________ at the New Theatre.

Many facts proved that long before Columbus ________ America, Chinese had visited it.

—Mike, why didn’t you come yesterday? —I __________, but I had an unexpected visitor.

First aid is a temporary form of help       to someone who suddenly falls ill or gets       ——before a doctor can be found.

 — It has been so foggy recently. — Cheer up! The fog               to clear up from tomorrow.