2)immediately; without delay Do it at once 4. Summary Scanning a reading passage before you read it can be a very useful way to improve our comprehension if you keep your mind active as you scan 5. Homework: Review the whole unit2) immediately; without delay Do it at once 4. Summary Scanning a reading passage before you read it can be a very useful way to improve our comprehension if you keep your mind active as you scan. 5.Homework: Review the whole unit