I. 1. 去掉第二个will 2. while → when

　3. before → since 4. until → when

II. 1. Watching TV 2. he seems to have

　3. Unless necessary 4. when

5. conference a ready man; writing an exact man

Part 3

I. 1. otherwise 2. deadline 3. harmony

　4. schedule 5. humourous 6. budget

II. 1. for 2. at 3. in 4. on

III. 1. been blessed with 2. coming out

3. beg for 4. far from perfect

5. made a deep impression