單項(xiàng)選擇題The ship is listing too much due to your faulty method in loading operation．You must keep her （）.
A.flat
B.up
C.upright
D.vertical
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1.單項(xiàng)選擇題The ship（）about 1/2 miles southward of the lighthouse.
A.moors
B.moor
C.is moored
D.mooring
2.單項(xiàng)選擇題The proper place（）the sling is made up is the square of the hatch.
A.which
B.where
C.when
D.how
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