________ is known to everyone, the moon travels around the earth once every month.
A．It B．As C．That D．What
- Have you moved into the new flat?
- Not yet, the rooms __________.
A. are being painted C. are painted
B. are painting D. are being painting
Tony ______ his homework this morning before he went to school.
A. has done B. did C. has done D. will do
He was about to tell me the secret _______ someone patted him on the shoulder.
A. as B. when C. while D. then
E-mail, as well as telephones, _____ an important part in daily communication.
A. is playing B. have played C. are playing D. play
Hiking is ______ great fun. You will get close to ______ nature and take exercise at the same time.
A. a; the B. a; ／ C. ／; the D. ／; ／
