Although James Cook   the first westerner to have discovered Australia,New Zealand and Hawaii,his travels led to the creation of more accurate and reliable maps for vast parts of the world.
#89166
A
isn’t
B
wasn’t
C
must have been
D
may not have been
推荐题目
When a pencil is partly in a glass of water, it looks as if ____. 
#89905
A
breaks
B
has broken
C
were broken
D
had been broken
The captain urged that the mission ______ before dark.
#88032
A
must be finished
B
be finished
C
ought to be finished
D
was finished