问题：
It is surprising that such a young boy can swim ______ the river ______ 100 meters wide.
A．over; measured
B．across; measuring
C．across; measures
D．through; measuring
It is surprising that such a young boy can swim ______ the river ______ 100 meters wide.
| A．over; measured | B．across; measuring |
| C．across; measures | D．through; measuring |
参考答案：