As far as we know, Africa is ________ continent in the world.
[ ]
| A.a second largest | B.the second large |
| C.the second largest | D.a second large |
Some students went to the Great Wall, a teacher ________.
[ ]
| A.include | B.including |
| C.to be included | D.included |
The damaged computer is hard ________.
[ ]
| A.to be repaired | B.to repair |
| C.to repair it | D.for repairing |