"The ground is wet." "Yes, didn't you know? ______for the last 20 minutes."
-David has made up his mind to continue with his studies. -_______ and _______.
This book is said to be a very special one, because it _______ many events not found in other history books.
-Have you finished _______ your composition? It is time to hand it in. -Not yet, I _______ it the whole morning, but it is so hard that I only finished half of it.
-What I told you just now is very important, _______? -Yes, it is clear.
For quite a few students, their teacher’s advice is more important than _______ of their parents’.