My brother is really ____. He often works in his office far into the night.

Their cheerful voices showed that they were having a          discussion.

For our middle school students, some courses are compulsory, while others are ________.

The patient isn’t out of danger.He is _________ than he was yesterday.

Nowadays as a journalist, you have to be immediate in covering a news event and _____ in your account of the news story. I dare say it’s really a tough job.