3. Are they joined together or __________?

　　4. His __________ from his family made him very sad.

　　答案：

　　( 1 ) 1. recently 2. recent

　　( 2 ) 1. reasonably 2. reasonable

　　3. reasonable 4. reason 5. reason

　　( 3 ) 1. revolution 2. revolutionary

　　3. revolutionary 4. revolutionaries

　　( 4 ) 1. Russian 2. Russians

　　3. Russian 4. Russian 5. Russia

　　( 5 ) 1. sadness 2. sadly

　　3. sad 4. sad

　　( 6 ) 1. safely 2. safe

　　3. safe 4. safety

　　( 7 ) 1. satisfying 2. satisfy

　　3. satisfied 4. satisfaction

　　5. satisfactory

　　( 8 ) 1. science 2. science

　　3. scientists 4. scientific

　　( 9 ) 1. secretary 2. secretly 3. secret 4. secrets

　　( 10 ) 1. separated 2. separate

　　3. separate 4. separation