21. Mary was so ___ in aprreciating the beautiful view that she didn't realize the weather was____.
________ is known to everyone, the moon travels around the earth once every month.
- Have you moved into the new flat?- Not yet, the rooms __________.
Tony ______ his homework this morning before he went to school.
He was about to tell me the secret _______ someone patted him on the shoulder.
E-mail, as well as telephones, _____ an important part in daily communication.