單項(xiàng)選擇題You have not plugged up the drainage, have you?（）.
A.No, I have
B.Yes, I haven't
C.Yes, I have
D.No, I didn't
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A.damaged
B.damage
C.damaging
2.單項(xiàng)選擇題You need to make a fixed loop at the end of a line in order to use the line as a mooring line. You have insufficient time to make a splice. Which knot should you use?（）.
A.Clove hitch
B.Fisherman's bend
C.Bowline
D.Round-turn and two half hitches
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