The young man, who had rushed into the fire to save the old man, _____ rewarding.

The flooding      the bridge, so we can’t walk across it forever.

The 1930s __________ the suffering of the Chinese from war.

-----What’s wrong with him?-----The picture he came across ________his memory of a sad story in his childhood.

-- Why was Mr. Wang so happy this morning?-- Because he was ______  a large sum of money for his creative achievements in teaching.