China's icebreaker Xuelong  ______  by heavy floes since Friday after rescuing passengers on a Russian vessel stranded in Antarctica.
#99668
A
has been trapped
B
had been trapped
C
has trapped
D
was trapped
推荐题目
Now then, children, it’s right time you ______.
#102530
A
wash and dress
B
are washed and dressed
C
will wash and dress
D
were washed and dressed
Because the shop ______, all the T-shirts are sold at half price.
#101466
A
has closed down
B
closed down
C
is closing down
D
had closed down