I think Book 6 is ________ than Book 5.
| A．much difficult | B．very difficult | C．more difficult | D．the most difficult |
_____you_____the singingcompetition The voice of Chinalastyear?
A.Have;entered.B.Did; enter. C.Did;entered
South Africa (南非） is acountry.
| A．developed |
| B．developing |
| C．develop |
| D．development |
Columbus __________ America in 1492.
| A．discovered | B．looked for |
| C．invented | D．made |
-Have you visited New York?
-Yes, I have. I __________ there twice.
| A．have gone | B．will go |
| C．have been | D．went |
Our English teacher __________ to England. She'll come back in ten months.
A. have been
B. has been
C have gone
D. has gone